Bidmas Blaster

Get a free trial now!

Teachers, create your own FREE account at Mangahigh. Students will be able to save their scores, earn medals and access Prodigi.

Create School Student will be able to earn Silver and Bronze Medals

Achievements

expand  
Achievement Goal Bronze Silver Gold Medals won
Addition & subtraction Complete the first stage, Training Ground 10,000 20,000 30,000  
Brackets, multiplication & division Complete the second stage, Robo-Barracks 10,000 20,000 30,000  
Brackets & the 4 operations Complete the third stage, Assembly Line 10,000 20,000 30,000  
Introducing powers & roots Complete the fourth stage, Weapons Store 10,000 20,000 30,000  
Full BIDMAS: all operations Complete the fifth stage, Professor's Lab 10,000 20,000 30,000  
Click and Drag

Instructions

expand  
Game Goals

This maths game helps with BIDMAS (Brackets, Indices, Division, Multiplication, Addition, Subtraction), the order of operations.

Roborators were created to help us, but Professor BIDMAS has infected them with a virus: they now classify all human life as litter and plan on eradicating mankind. You must hurry to the Roborator factory and destroy the Roborators with your powerful weapons.

The Roborators are equipped with shields, which you can deactivate with BIDMAS code-cracking skills. Use Order of Operations to blow up Roborators and so gain experience points and earn bounty money.

The cash can be used to buy more powerful weapons in the shop, and the experience points are required to clear the level.

How To Play

You must clear five different stages, each corresponding to a different part of the factory, in order to vanquish the Roborator menace. In each stage, Roborators will spawn and advance slowly towards you. Each Roborator has a code, or formula, displayed above its head: you must type in the answer to this formula to disable the Roborator's shield and blast it.

There are four classes of Roborator (green, purple, yellow, and red), which get progressively harder within each stage. If you achieve a 'Combo' of nine consecutive correct answers for any given Roborator class, then the next, higher class of Roborator appears. The tougher Roborators are worth more experience points and higher cash values (see below).

You get four Lives in each level, which are lost one at a time with blows from the advancing Roborators. An incorrect answer results in loss of time but not loss of a life.

Your selected weaponry appears in the bottom-left of the screen. Switch weapons and ammunition to fire more rapidly or unleash greater destructive power.

Game Controls

You may enter answers either using the keyboard, or by clicking on the number pad in the bottom-right of your screen.

Weapons may be selected by clicking on the weapons interface in the lower-left side of the screen or using the hotkeys below:

Weapon Hot Key Description
Laser Pistol E Entry-level firepower - weak and slow.
Laser Rifle R More effective weapon for pin-point accuracy
Launcher T Devastating anti-mech weapon with multi-annihilation capability. Experienced personnel only.
Ammo Z & X Different types of ammo have very different explosive powers.
Grenade Q Blows up all Roborators on-screen but does not count towards experience points or bounty money
Memoray S Briefly shows answers to all formulae on-screen.
ElectroWall W Electric wall that destroys any robot that touches it. Does not count towards experience points or bounty money.
Stungun A Slows down all Roborators for a short time
Stages

The factory contains five stages, and you graduate from one stage to the next by earning sufficient Experience Points (as shown by the meter on the right side of the screen filling up):

Stage Maths Content
Training Ground Addition, Subtraction
Robo-Barracks Brackets, Multiplication, Division
Assembly Line Brackets, Addition, Subtraction, Multiplication, Division
Weapons Store Brackets, Addition, Subtraction, Multiplication, Division
Prof's Lab Brackets, Addition, Subtraction, Multiplication, Division, Indices
Scoring

You earn cash for destroying Roborators (Hit£) and for demonstrating consistency in your code-cracking ability (Combo£):

Hit£

The Hit£ value earned for destroying a Roborator depends on the Roborator's class and the speed with which you calculate its code:

Hit£ = £25 × Roborator Class × Distance Factor

Distance Factor depends on how far the advancing Roborator is away from you when blasted. Distance is used as a proxy of your speed of calculation, i.e. if you destroy a Roborator when it's far away, you score the highest Hit£ score. The range of values for Roborator Classes and the Distance Factors are:

Roborator Class
Easy Class Roborator (green) Medium Class Roborator (purple) Hard Class Roborator (yellow) Extreme Class Roborator (red)
Value = 1 Value = 2 Value = 3 Value = 4
Distance Factor
Near Medium Far
Value = 1 Value = 2 Value = 4

For example: a Yellow Roborator hit at a medium distance is worth: £25 × 3 × 2 = £150, whereas a Red Roborator hit at a far distance is worth: £25 × 4 × 4 = £400.

The cash earned from destroying Roborators in a stage is the cumulative sum of all Hit£ in that stage, i.e. ∑Hit£.

Combo£

The Combo£ bonus depends on the Roborator's class and the number of consecutive correct answers (3, 6, or 9):

Combo£ = £100 × Roborator Class × Combo Factor

The range of values for Roborator Classes and the Combo Factors are:

Roborator Class
Easy Class Roborator (green) Medium Class Roborator (purple) Hard Class Roborator (yellow) Extreme Class Roborator (red)
Value = 1 Value = 2 Value = 3 Value = 4
Combo Factor
Combo × 3 Combo × 6 Combo × 9
Value = 1 Value = 4 Value = 20

For example: destroying six Purple Robots without making any mistakes is worth: £100 × 2 × 4 = £800, whereas destroying nine Yellow Robots without making any mistakes is worth: £100 × 3 × 20 = £6000.

The cash earned from demonstrating consistency in a stage is the cumulative sum of all Combo£ in that stage, i.e. ∑Combo£.

Thus, the total cash earned in a stage is:

Total Score (in each stage) = ∑Hit£ + ∑Combo£
Click and Drag

Improve Your Score

expand  
Basic Strategies

Don't let Roborators get too close. The further away they are when you blast them, the more cash you earn: a "Far" Roborator is worth 4 times more than a "Near" one.

Combos can boost your score quickly. Focus on getting as many consecutive correct answers as possible. Combo x 9 gives you the maximum bonus and brings on the next Roborator class.

Higher-class Roborators are worth more money and earn more experience points per hit. Try to get to the red Roborators as quickly as possible, with as many lives to spare as possible.

Your ComboCounter gets reset if you enter an incorrect answer or lose a life. You have four Lives that get replenished at the end of the stage. It is often worth risking a life or two to get the extra few seconds to work out the right answer.

Weapons

Save the best weapons for the toughest Roborators:

MemoRay
This the most valuable weapon, as any Roborators destroyed using it count towards both the dollar value and experience points earned for clearing the stage. Use it when there are multiple Roborators on the screen to maximise its value.
Rocket Launchers
In multi-annihilation mode this destroys two Roborators with one answer, but does not provide additional experience points. It has a max ammo limit of 50 rockets, so keep an eye on your rocket inventory.
Grenades
These are very powerful, as they clear all Roborators on-screen. However, like the ElectroWall, it does not contribute towards cash earned or experience points. Use them wisely!
Maths Strategies

In each stage the maths gets tougher and tougher, so here are some expert survival tips!

Training Ground

Try to use "number bonds" that make 10. For example: 34 + 56. Notice that 4 and 6 always go together to make an extra 10.

When adding numbers together, try to add the tens together and then the units. For example: 24 + 35. Do 20 + 30 = 50, then 4 + 5 = 9. So the answer is 59.

When subtracting, it is sometimes easier to "add on". For example: 37 − 29. How many do you add onto 29 to make 37? Answer: 8. This might be easier than taking 29 away from 37.

When adding and subtracting three numbers, work out the answer to the two smaller numbers first. For example: 23 + 15 − 9. Work out 15 − 9 = 6 first, then do 23 + 6. So the answer is 29.

Sometimes it's easier to do adding and subtracting in a different order. For example: 59 + 12 − 36 might be easier to do as 59 − 36 + 12.

When a number is very close to 100 you might use the method of "borrowing". For example: 78 + 97. You only need 3 extra to make 97 into 100. So you "borrow" 3 from 78. So the question is now the much easier 75 + 100. Answer: 175.

Robo Barracks

Anything multiplied by zero always makes zero. Don't waste time working out a question if it gives the answer zero. For example: (3 × 7) × 0. Don't work out 3 × 7.

If you multiply by a number and then divide by the same number, you basically cancel out that number. For example: (7 × 6) ÷ 6. Here you are multiplying by 6 and then dividing by 6. You can ignore the 6s, so the answer is just 7.

If you multiply by a number and then divide by the same number, you basically cancel out that number. For example: (3 × 35) ÷ 15. Here you are multiplying by 3 and then dividing by 15. But 15 is the same as 3 × 5. So there is a multiply by 3 and a divide by 3. They cancel themselves, so (3 × 35) ÷ 15 changes into 35 ÷ 5.

When you multiply numbers that end in zero you can ignore the zero to begin with. For example: 12 × 20. Work it out as 12 × 2 to make 24. Then add an extra zero to make 240.

When you divide numbers that end in zero you can ignore the zeros. For example: 120 ÷ 20 is the same answer as 12 ÷ 2.

When you multiply by a number close to 10 or 20 try using this strategy. For example: 13 × 19. Do 13 × 20 = 260. Then subtract 13 to make 19 lots of 13. Answer: 247.

When dividing with big numbers, try to approximate the answer. For example: 112 ÷ 14. If you know 140 ÷ 14 is 10, then 112 ÷ 14 will be a bit less than 10. You might be able to tell that it must be closer to 8 than 7 or 9. All answers in Bidmas Blaster are whole numbers, so the answer is 8.

When dividing with big numbers, try to approximate the numbers. For example: 245 ÷ 49. You can approximate this as 250 ÷ 50, making the answer 5.

Assembly Line

When multiplying a bracket it is sometimes easier to multiply each number in the bracket separately. For example: 5 × (3 + 10) can be worked out as 5 × 3 + 5 × 10 = 15 + 50 = 65. This might be easier than doing 5 × 13.

Weapons Store

Any expression inside a bracket multiplied by zero always makes zero. Don't waste time working out a question if it gives the answer zero. For example: (83 − 17) × 0 = 0, so you don't need to work out 83 − 17.

Prof's Lab

If you are rooting a multiplication or division, you can root the numbers separately. For example: √(144 × 9) = √144 × √9 = 12 × 3 = 36. Another example: √(144 ÷ 9) = √144 ÷ √9 = 12 ÷ 3 = 4.

There are two very useful square roots you should try to remember: √169 = 13 and √196 = 14. Notice that the numbers 6 and 9 are just reversed.

There are two very useful cube roots you should try to remember: 3√125 = 5 and 3√216 = 6. Notice that the numbers end in 5 and 6.

Click and Drag

More Games

Left

Maths Games

Try these short versions of our free maths games. Your students can play full length versions for free when you create a school account and issue them with logins.

Jetstream Riders
Times Tables and numeracy skills

Want to make it as a competitive balloonist? Well, your numeracy skills had better be good. Answer maths questions to make your balloon rise, and navigate tricky obstacles in this addictive multiplayer physics game.

Use your numeracy skills to beat the other balloonists and unlock daring new levels!
  • Addition
  • Subtraction
  • Times Tables
  • Division
Play Now more info...
Piñata Fever
Add and Subtract with Negative Numbers

Keep the party pumping in this fast n’ furious piñata smash-‘em-up! Move along the number line to intercept the descending piñatas, and then whack them for candy. Come on, catch the fever!

Add and subtract negative numbers to smash the piñatas and keep the party pumping!
  • Addition
  • Subtraction
  • Number line
  • Negative numbers
Play Now more info...
Sundae Times Lite
Basic Mental Maths

Use your mental maths skills to build the tallest, most incredible ice cream sundae possible! Play against the computer or head-to-head versus other students from around the world.

Create the biggest ice cream sundae in the world with your mental maths skills!
  • Addition
  • Subtraction
  • Multiplication
  • Division
Play Now more info...
A Tangled Web
Angles, from basic rules to circle theorems

Help Itzi the spider climb the clock to rescue his family! Solve cunning angle puzzles to reveal a path through each level’s maze of tangled webs and reach the goal. It’s sure to make your head spin!

Solve cunning angle puzzles and guide Itzi the robotic spider to the goal!
  • Basic angle rules
  • Parallel lines
  • Polygons
  • Circle theorems
Play Now more info...
Wrecks Factor
Factorise simple and harder quadratics, including quadratics with common factors

S.O.S.! Ships navigating the treacherous Bermuda Rectangle are falling prey to bizarre disasters. Factorise quadratic expressions to answer the ships’ distress calls and save their stricken crews!

Save the crews of the sinking ships with your powers of quadratic factorisation!
  • Quadratics
  • Factorising
  • Difference of two squares
  • Common factors
Play Now more info...
Sundae Times
Times tables from ×2 up to ×15

Use your knowledge of times tables to build the tallest, most incredible ice cream sundae possible! Play against the computer or head-to-head versus other students from around the world.

Use times tables to build the tallest, most incredible ice cream sundae possible!
  • Times tables
  • Number bonds
  • Multiplication facts
  • Mental maths
Play Now more info...
Pyramid Panic Lite
Lengths, Perimeters and Areas of Shapes

Help, you've been mummified! Use your geometry skills to build a path and escape from the pyramid, staying ahead of the mongrel demon Ammit. Battle skull bats and skeleton thieves with your magical ankh cross.

Use your shape skills to escape the mysterious pyramid!
  • KS2-focused
  • Circles
  • Perimeters
  • Areas
Play Now more info...
Sigma Prime Lite
Prime Factorisation with Multiplication and Division

Use multiplication and division with primes and prime factorisation to defeat the alien invasions. Make use of divisibility strategies to achieve higher scores and progress to the next challenge.

Defeat the alien invasions in a maths game specially designed for primary-level students!
  • KS2-focused
  • Prime Factorisation
  • Indices
  • Multiplication
  • Division
Play Now more info...
Bidmas Blaster
B.I.D.M.A.S., The Order of Operations

Professor BIDMAS' roborators have run amok and need to destroyed. Use your order-of-operations code-cracking abilities and powerful weaponry to close these robo-rebels down.

Use BIDMAS to blast the Roborators into scrap metal!
  • BIDMAS
  • Indices
  • Roots
  • Times tables
Play Now more info...
Pemdas Blaster Lite
B.I.D.M.A.S., The Order of Operations

Apply your knowledge of the four operations (addition, subtraction, multiplication, division) to crack the attacking Roborator's shield codes and then blast them into scrap metal!

Fast-paced robot blasting action specially designed for primary-level students!
  • KS2-focused
  • Addition
  • Subtraction
  • Multiplication
  • Division
Play Now more info...
Flower Power Lite
Ordering Decimals, Fractions & Percentages

Grow flowers and harvest them to make money in this addictive order-'em-up. It may look simple but it's fractionally harder than you might imagine. Remember to wait for the bee!

Grow a beautiful flower garden in this game specially designed for elementary students!
  • KS2-focused
  • Ordering
  • Decimals
  • Fractions
Play Now more info...
Algebra Meltdown
Linear Equations and Number Machines

Solve linear equations to guide atoms through the reactor. But don't keep the scientists waiting too long or they blow their tops! It's the ultimate nuclear test of your maths skills!

Solve linear equations in the ultimate nuclear test!
  • Linear equations
  • Using number machines
  • One/multi-stage equations
Play Now more info...
Sigma Prime
Prime Factorisation with Multiplication and Division

Use multiplication and division with primes and prime factorisation to defeat the alien invasions. Make use of divisibility strategies to achieve higher scores and progress to the next challenge.

Defeat the alien invasions using primes and prime factorisation.
  • Prime Factorisation
  • Indices
  • Multiplication
  • Division
Play Now more info...
Ice Ice Maybe
Fast Estimation with Basic Number Calculations

Help penguins migrate across a perilous ocean patrolled by hungry killer whales. Use your estimation and approximation skills to position floating icebergs and bounce the penguins safely from glacier to glacier.

Estimate and bounce the penguins to their holiday haven!
  • Percentages
  • Addition
  • Subtraction
  • Multiplication
  • Division
Play Now more info...
Pyramid Panic
Basic Shapes to Advanced Geometry

Help, you've been mummified. Use your geometry skills to build a path across the voids, and escape from the pyramid, staying ahead of the mongrel demon Ammit. Battle skull bats and skeleton thieves with your ankh cross.

Call upon your geometry skills to escape evil Ammit!
  • Trigonometry
  • Pythagoras
  • Areas
  • Perimeters
  • Circumference
Play Now more info...
Flower Power
Ordering Decimals, Fractions & Percentages

Grow flowers and harvest them to make money in this addictive order-'em-up. It may look simple but it's fractionally harder than you might imagine. Remember to wait for the bee!

Order the buds in this bloomin' brilliant flower-'em-up!
  • Ordering
  • Decimals
  • Fractions
  • Percentages
Play Now more info...
TranStar
Reflections, Rotations, Enlargements and Translations

Guide TranStar through the perilous voids of space in search of a new home. Call upon the power of exotic space transformation phenomena to reflect, rotate, translate and enlarge TranStar into the safety of the StarGate.

Apply transformations to guide a lost space entity back home!
  • Reflections
  • Rotations
  • Enlargements
  • Translations
Play Now more info...
Save Our Dumb Planet
Linear, Quadratic and Cubic Equations

Defend Earth from deadly meteorites using the planetary missile defences. A team of dumb scientists are on hand to suggest possible trajectories and trash-talk. Quickly plot your waypoints or find a new planet!

Plot missile flight paths to blast the meteors!
  • Linear eqns
  • Quadratic eqns
  • Cubic eqns
  • Coordinates
  • BIDMAS
Play Now more info...
Right