The number that is to be subtracted. The second number in a subtraction.

The first number in a subtraction. The number from which another number is to be subtracted.

Bridge 100 by subtracting in multiples of 10

Maths

Composition of 100 in 10s and 1s

Composition of 100 in 50s, 25s and 20s

Multiples of 10 that total 100

Use known facts to find pairs of numbers that total 100

Use known facts to find complements to 100 efficiently

Represent 3-digit multiples of 10 in different ways

Use place value knowledge to write addition and subtraction equations

Bridge 100 by adding in multiples of 10

Solve problems using knowledge of addition and subtraction of multiples of 10

In this unit pupils will use known facts to find multiples of ten that compose 100  and use known facts to find complements to 100.  In the future unit pupils will find a 2-digit number and a 1 or 2-digit number that compose 100. Pupils will position 3-digit numbers on a number line and estimate the position of 3-digit numbers on unmarked number lines. They will compare and order 3 digit numbers.

In the prior unit pupils reviewed and secured previous knowledge of add 3 addends, understanding they can be added in any order, bridging through 10. In this unit pupils will use known facts to find multiples of ten that compose 100  and use known facts to find complements to 100.

In this unit pupils will use known facts to find multiples of ten that compose 100 and use known facts to find complements to 100. They will add and subtract multiples of ten, bridging 100.

Securing place value to 100 and applying to addition and subtraction

Which number is the subtrahend in this calculation? 150 - 70 = 80 

Which number is the minuend in this calculation? 130 − 50 = 8 tens

Match the known number fact to its related multiple of ten.

Which partitioned subtrahend will help you to bridge 100?

How would the subtrahend 70 be partitioned in this equation?

What is the missing value? 8 tens + {{ }} tens = 13 tens.

What are the addends in this calculation: 90 + 30 + 10 = 130

If I know 6 + 7 = 13, what is 6 tens + 7 tens? {{ }}

Match the linked equations. Which number facts would you use to solve each equation with multiples of 10? 

 What is the sum of these addends 40 + 60 + 50 = {{ }}

 What is the missing addend 80 + {{ }}  + 40 = 140?

Bridge 100 by subtracting in multiples of 10

Lesson outcome