Rounding 3-Digit Numbers to the Nearest Ten 3-24

Generalize by determining if a 3-digit number is closer to the number of tens it has, or 1 more ten. What's 286 rounded to the nearest ten? The nearest multiples of ten are 280 and 290 – 28 tens and 29 tens. Halfway between 280 and 290 is 285. 286 is greater than 285, so it's closer to 29 tens. Round up to 290.

 
 

1. Learn

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Generalize by determining if a 3-digit number is closer to the number of tens it has, or 1 more ten. What's 286 rounded to the nearest ten? The nearest multiples of ten are 280 and 290 – 28 tens and 29 tens. Halfway between 280 and 290 is 285. 286 is greater than 285, so it's closer to 29 tens. Round up to 290.

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2. Practice

Lesson
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Lesson
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Lesson
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3. Apply

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POD
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POD
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Want more? Try Rounding Rocks! C!