Number (mult/div)
UK Primary (3-6)
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Use rounding to estimate solutions

Interactive practice questions

Let’s estimate the solution to $24\times24$24×24 by rounding the digits first.

a

Rewrite the calculation but use rounded numbers to the nearest $10$10.

$\editable{}\times\editable{}$×

b

Calculate $20\times20$20×20.

c

Is $400$400 going to be larger or smaller than the actual result of $24\times24$24×24?

Smaller

A

Larger

B

Smaller

A

Larger

B
Easy
Approx a minute
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Let’s estimate the solution to $28\times38$28×38 by rounding the digits first.

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Let’s estimate the solution to $224\times73$224×73 by rounding the digits first.

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