To split a whole up into parts - a piece or section of a whole.

Solve equations involving the subtraction of two-digit numbers

Maths

In this unit pupils will learn to find 10 more or less than a 2-digit number. They will  add and subtract 10 to/from a 2-digit number using number facts. 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 will learn to find 10 more or less than a 2-digit number. They will  add and subtract 10 to/from a 2-digit number using number facts.

Addition and subtraction of two 2-digit numbers

Match the expressions which have the same value.

Which number is missing in the equation? 74 − 34 = 74 − {{ }} − 4

Which equation is represented by the number line.

How many tens are in the missing part? 47 − _4 = 23

Find the missing part. 75 − {{  }} = 31

Izzy wants to solve the equation 87 − 6 = ? Which is the most efficient strategy to use?

Andeep has £78 and he buys a unicorn. Which known fact should he use to calculate how much money he has left?

Match each equation to say which digit will change when it is solved.

Match the equations which will leave the same part remaining.

Fill in the missing number to solve the equation 76 − 35 = ?

Choose an equation to represent the number line.

This lesson will soon be taken down.

Solve equations involving the subtraction of two-digit numbers

Lesson outcome