Subtracting numbers that bridge through 10

I can subtract through 10 using bridging.

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Year 3

Subtracting numbers that bridge through 10

I can subtract through 10 using bridging.

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Lesson details

Key learning points

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.

Common misconception

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.

Keywords

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.

It would be helpful if pupils have tens frames, counters and/or number lines to help them represent the problems. Pupils may also benefit from having the number cards 1-9.

Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).