Rounding numbers
Where will you find these numbers on a number line?
Which two hundreds numbers is each one positioned between? Which two tens numbers is each one positioned between?
Is 23 closer to 20 or 30?
1
3
7
23
20
21 22
24
25 26 27 28 29 30
There are 3 steps to 20 and there are 7 steps to 30, so 23 is closer to 20 than 30. When we round 23 to the nearest ten, we say 23 rounds to 20 because 20 is the nearest multiple of ten.
Is 45 closer to 40 or 50? There are 5 steps to 40 and there are 5 steps to 50, so 45 is in the middle of 40 and 50.
2
When a number is in the middle, we round up to the nearest ten, so we say 45 rounds to 50 because 50 is the next multiple of ten.
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03/05/2022 10:19
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