# Robo Ops

## Order of operations

Using your knowledge of BIDMAS, decrypt the key to rescue the Roborators from the control of Professor BIDMAS.

## Selection of related activities

Curriculum-aligned activities

• ### Order of operations using brackets

Understand the use of brackets to determine the order of operations.

• ### Add and subtract large numbers mentally

Extend mental-methods for whole-number calculations, for example to subtract one near-multiple of 1000 from another (e.g. 6070 - 4097).

• ### Quick methods for multiplication

Use short cut strategies to multiply e.g. 19 times a number is 20 times the number subtract the number.

• ### Quick methods for division

Use short cut strategies to divide e.g. division by 5 is division by 10 followed by doubling.

• ### Mental multiplication and division

Extend mental-methods for whole-number calculations with multiplication and division. For example to multiply a two-digit by a one-digit number, 12 × 9, work out 12 × 10 then subtract 12.

• ### Positive powers

Understand the pattern of results found from the positive integer powers. i.e. the continuing division of successive results as the power reduces by 1 and continued multiplication as the power increases by 1. Spot patterns in the sequence, e.g. in the units digit. Know the terms square (squared) and cube (cubed). Understand what is meant by a number to any positive integer power.

## How to teach Algebra using Mangahigh

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