Subtracting numbers that bridge through 10 | Maths | Quizalize & Oak National Academy

Starter quiz

What is the missing subtrahend?
- '7' ✓
Which equations have a difference of 10?
- 14 − 4 = ✓
- 16 − 5 =
- 18 − 7 =
- 13 − 2 − 1 = ✓
There are 18 slices of pizza. Alex eats some slices. There are 10 slices left. How many slices did Alex eat?
- '8' ✓
Match each equation with the correct difference.
- 10 − 5 =
  
  ⇔
  
  5 ✓
- 10 − 3 − 1 =
  
  ⇔
  
  6 ✓
- 10 − 3 − 3 =
  
  ⇔
  
  4 ✓
- 10 − 2 − 5 =
  
  ⇔
  
  3 ✓
Calculate the missing subtrahend.
- '5' ✓
What could the missing subtrahends be? Tick all the possible answers.
- 3 and 4 ✓
- 5 and 1
- 7 and 0 ✓
- 6 and 2

What is 12 − 4?
- '8' ✓
Izzy is trying to find the answer to 13 − 6. What is the best way of partitioning 6 to bridge 10?
- 3 and 3 ✓
- 2 and 4
- 5 and 1
Alex has 11 cherries. He eats 7 of them. How many are left?
- 3
- 4 ✓
- 5
- 6
Izzy uses a number line to find the answer to an equation. What has Izzy subtracted altogether?
- '5' ✓
Match the equations to the correct differences.
- 12 − 3 =
  
  ⇔
  
  9 ✓
- 13 − 5 =
  
  ⇔
  
  8 ✓
- 11 − 4 =
  
  ⇔
  
  7 ✓
- 12 − 6 =
  
  ⇔
  
  6 ✓
What is the missing subtrahend?
- '7' ✓

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When the subtrahend is bigger than the ones value of the minuend, we will have to bridge through 10
Composition of numbers to 10 allows us to partition numbers when we are subtracting.
Composition of numbers to 10 allows us to bridge through ten when subtracting.

Pupils may incorrectly partition the subtrahend.

Partition the subtrahend to count back to ten or a tens number. Use number pairs that total ten to help subtract whatever is left.

Minuend - The minuend is the number being subtracted from.
Subtrahend - A subtrahend is a number subtracted from another.
Bridge - Bridge means subtracting to make 10 and then subtracting whatever is left.
Partition - Partition means splitting a number into smaller parts.