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Rounding One way of estimating Ask “About how many?” Round to the nearest 10 Round to the nearest 100 Round to the nearest 1,000.

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Presentation on theme: "Rounding One way of estimating Ask “About how many?” Round to the nearest 10 Round to the nearest 100 Round to the nearest 1,000."— Presentation transcript:

1 Rounding One way of estimating Ask “About how many?” Round to the nearest 10 Round to the nearest 100 Round to the nearest 1,000

2 30 31 32 33 34 35 36 37 38 39 40 Round to the nearest 10 X Is 33 closer to 30 or 40? How can you tell?

3 Complete the equation using >,<, or = 65,897 65,913 When rounding it comes down to two simple choices! UP or DOWN. Let’s investigate!

4 10 11 12 13 14 15 16 17 18 19 20 Round to the nearest 10 X Which two 10’s is 17 between? That means that when rounding 17 to the nearest 10 your only choices are 10 and 20.

5 Complete the equation using >,<, or = 65,897 65,913 When rounding to the nearest TEN the ONES place always tells you what to do!

6 10 11 12 13 14 15 16 17 18 19 20 When rounding to the nearest 10 the ONES place value tells you which way to go! X 1717 Since there is a 7 in the ones place this number rounds UP to 20. 5 or more, up the score. 4 or less doesn’t pass the test.

7 60 61 62 63 64 65 66 67 68 69 70 When rounding to the nearest 10 the ONES place value tells you which way to go! X 6262 Since there is a 2 in the ones place this number rounds DOWN to 60. 5 or more, up the score. 4 or less doesn’t pass the test.

8 40 41 42 43 44 45 46 47 48 49 50 When rounding to the nearest 10 the ONES place value tells you which way to go! X 4545 Since there is a 5 in the ones place this number rounds UP to 50. 5 or more, up the score. 4 or less doesn’t pass the test.

9 Round to the nearest 10 3838

10 1

11 94

12 Round to the nearest 10 99

13 Round to the nearest 10 71

14 Round to the nearest 10 55


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