Subtract by bridging a multiple of ten
I can bridge ten to subtract single digit numbers from two-digit numbers.
Subtract by bridging a multiple of ten
I can bridge ten to subtract single digit numbers from two-digit numbers.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- When we subtract a one-digit from a two-digit number, the equation may be solved more efficiently by 'bridging ten'.
- When bridging a multiple of ten, the number that is subtracted is partitioned to reach the previous multiple of ten.
- Bridging ten is an efficient strategy because number pairs to ten can be used to calculate more easily.
Keywords
Bridge - A strategy that involves using a multiple of ten as a 'bridge' so numbers can be partitioned to make use of bonds to ten and calculate efficiently.
Partition - To split a whole up into parts.
Common misconception
Children may think the multiple of ten before 43 is 30, or partition the subtrahend incorrectly when bridging, meaning they do not use the most efficient strategy.
Display and use the stem sentences to support articulation of how to find the previous multiple of ten. Use ten frames, number lines and one hundred squares to support with appropriate partitioning of numbers.
To help you plan your year 2 maths lesson on: Subtract by bridging a multiple of ten, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 2 maths lesson on: Subtract by bridging a multiple of ten, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 1 maths lessons from the Adding and subtracting ones and tens to and from 2-digit numbers unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
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Starter quiz
6 Questions

Exit quiz
6 Questions



