Use known facts to find pairs of numbers that total 100
Lesson 8 / 10
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I can use known facts to find pairs of numbers that total 100
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Number facts to 10 can be applied to multiples of 10
If 3 plus 2 is equal to 5 then 3 tens plus 2 tens is equal to 5 tens.
When you add a single digit to a multiple of ten, only the ones digit changes.
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