Round Two-Digit Number
Round 13 to the nearest ten.
10
Round 115 to the nearest ten.
120
Would 55 round up, or down?
Up
Round 67 to the nearest ten.
70
What strategy did we learn to use today to round two-digit and three-digit numbers to the nearest ten.
Number line
Round 26 to the nearest ten.
30
160
How do you use a number line to round?
You start at the given number, then jump to the left of the number until you get to the nearest ten, then jump to the right of the number until you get the nearest ten. Whichever ten you are closest to/has the least amount of jumps, is the number you would round to.
Round 299 to the nearest ten.
300
What did the song we listened to teach us?
The song showed us how to round numbers to the nearest ten using a number line, and taught us that if the number in the ones place is larger than 5 we round up, but if the number in the ones place is less than 5 we round down.
Round 45 to the nearest ten.
50
Round 324 to the nearest ten.
320
Why is rounding important?
Rounding makes numbers easier to work with.
Round 15 to the nearest ten.
20
Round 889 to the nearest ten.
890
Round 87 to the nearest ten.
80
Round 566 to the nearest ten.
570
When the number in the ones place is less than 5, you round down.
True
Round 591 to the nearest ten.
590.
770
Round 97 to the nearest ten.
100
Round 892 to the nearest ten.
890
When the number in the ones place is larger than 5, you round up.
True
Round 642 to the nearest ten.
640
Challenge: Round 999 to the nearest ten.
1,000