Rounding



Videos

Rounding rap media type="custom" key="23679436" Math Playground video

How to Round Numbers

 * Decide which is the last digit to **keep**
 * Leave it the same if the **next digit** is less than 5 (this is called //rounding down//)
 * But increase it by 1 if the next digit is 5 or more (this is called //rounding up//)

Example: Round 74 to the nearest 10
**Answer: 70** (74 gets "rounded down")
 * We want to keep the "7" as it is in the 10s position
 * The next digit is "4" which is less than 5, so no change is needed to "7"

Example: Round 86 to the nearest 10
**Answer: 90** (86 gets "rounded up") media type="custom" key="26350664"
 * We want to keep the "8"
 * The next digit is "6" which is 5 or more, so increase the "8" by 1 to "9"

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