# Ice Ice Maybe

## Fast estimation with basic number calculations

Use your estimation and approximation skills to position floating icebergs and help the penguins to safety.

## Selection of related activities

Curriculum-aligned activities

• ### Estimation

Estimate the result of a calculation by using sensible rounding.

• ### Number partners up to 20

Recall all addition and subtraction facts for each number to 20. Use this to solve problems involving small or large numbers.

• ### Number pairs up to 100

Derive and recall all number pairs that total 100. Add or subtract mentally pairs of two-digit whole numbers (e.g. 47 + 58, 91 - 35).

• ### Relate addition to multiplication

Understand why the commutative, associative and distributive laws apply to addition and multiplication and how they can be used to do mental and written calculations more efficiently.

• ### Use percentages

Find percentages of numbers and quantities (e.g. 10%, 5% and 15% of 80p)

• ### Find a fraction of an amount - simple examples

Find a fraction of a number using division and multiplication. e.g. Find 3/8 of 32.

## How to teach Number using Mangahigh

Want a lesson plan using our activities?