Any of the numbers that are added together.

Find the missing addend when adding two-digit numbers

Maths

In this unit pupils apply their knowledge of known facts and understanding of place value to add and subtract with 2-digit numbers both within and across the tens boundary. In the future unit pupils will add 3 addends, understanding they can be added in any order, bridging through 10.

In the prior unit pupils added and subtracted 1s and 10s from 2 digit numbers. They used number facts to add/subtract a single-digit number to/from a 2-digit number and used a part-part-whole model to represent addition and subtraction. In this unit pupils apply knowledge of known facts and understanding of place value to add and subtract with 2-digit numbers within and across the tens boundary.

Addition and subtraction of two 2-digit numbers

Which of the following is the missing addend?

Use the first equation to help solve the second equation.

Which of the following cannot be one of the tens digits in the equation?

One of the Base 10 blocks has been moved over from one addend to the other. Which of the following could show the new equation? Tick two.

Match the expressions which will have the same sum.

 Which expression will have the same sum as 14 + 53?

Which equation will have a sum in the fifties?

Which equation will have a greater sum than 25 + 61 = ?

Starter Quiz