Estimating and Checking with Inverse Operations

Year 4 MathsAddition and Subtraction2 pages

About this worksheet

A quick exit ticket on estimating and checking for Year 4 maths, printed as identical slips so one run covers the class. Pupils write the inverse calculation that checks 425 + 150 = 575, write a rounded estimate for 892 - 314, then circle an emoji to show how the lesson felt. Linked to the England National Curriculum objective on solving number problems with larger numbers.

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Curriculum objectives covered

Number - number and place value

Solve number and practical problems that involve all of the above and with increasingly large positive numbers

Both questions check whether estimating and inverse checking have stuck.

What's inside this worksheet

Inverse operation question

Pupils write the calculation they would use to check that 425 + 150 = 575.

Estimation question

Pupils write a calculation with rounded numbers to estimate 892 - 314.

Feelings check

An emoji scale so you can see who found the lesson hard.

How teachers use it

Exit ticket

Hand a slip to each pupil in the last five minutes of the lesson.

Grouping tomorrow

Sort the slips into piles to plan the next lesson's groups.

Mid-topic check

Run it partway through the addition and subtraction unit to catch drift early.

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