Bridging 100: counting on and back in 10s, adding/subtracting multiples of 10
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Why this why now
This unit develops the knowledge of multiples of 10 totaling 100 to pairs of numbers that compose 100. Pupils use place value knowledge to represent 3-digit numbers in different ways, including on a number line. They calculate mentally with 3-digit numbers, finding 10 more and less, adding and subtracting 2-digit multiples of ten in preparation for more formal calculations in later units.
Prior knowledge requirements
- Recall number facts and sequences
- Use place value understanding
- Apply basic operations in context
Threads
Why this why now
This unit develops the knowledge of multiples of 10 totaling 100 to pairs of numbers that compose 100. Pupils use place value knowledge to represent 3-digit numbers in different ways, including on a number line. They calculate mentally with 3-digit numbers, finding 10 more and less, adding and subtracting 2-digit multiples of ten in preparation for more formal calculations in later units.
Prior knowledge requirements
- Recall number facts and sequences
- Use place value understanding
- Apply basic operations in context
Bridging 100: counting on and back in 10s, adding/subtracting multiples of 10
In this unit pupils will find pairs of number that compose 100. They will position 3-digit numbers on a number line and estimate their position on unmarked number lines. They will compare and order 3-digit numbers.
5 lessons in unit
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