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How to Round a Number to the Nearest Tenth (1 Decimal Place)

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Presentation on theme: "How to Round a Number to the Nearest Tenth (1 Decimal Place)"— Presentation transcript:

1 How to Round a Number to the Nearest Tenth (1 Decimal Place)

2 Place Value Review Notice the decmal point. All places to the right of the decimal end with “ths” ths

3 First look at the value of the digit in the hundredths column 4.675Has 7 hundredths

4 First look at the value of the digit in the hundredths column 4.675Has 7 hundredths 5.85Has 5 hundredths

5 First look at the value of the digit in the hundredths column 4.675Has 7 hundredths 5.85Has 5 hundredths 3.7298 Has 2 hundredths

6 First look at the value of the digit in the hundredths column 4.675Has 7 hundredths 5.85Has 5 hundredths 3.7298 Has 2 hundredths 4.23045Has 3 hundredths

7 You round down to the nearest tenth if the hundredths digit is 0,1,2,3 or 4. 3.726 is rounded down to 3.7

8 You round down to the nearest tenth if the hundredths digit is 0,1,2,3 or 4. 3.726 is rounded down to 3.7 4.23 is rounded down to 4.2

9 You round down to the nearest tenth if the hundredths digit is 0,1,2,3 or 4. 3.726 is rounded down to 3.7 4.23 is rounded down to 4.2 17.5178 is rounded down to 17.5

10 You round down to the nearest tenth if the hundredths digit is 0,1,2,3 or 4. 3.726 is rounded down to 3.7 4.23 is rounded down to 4.2 17.5178 is rounded down to 17.5 120.60124 is rounded down to 120.6

11 You round down to the nearest tenth if the hundredths digit is 0,1,2,3 or 4. 3.726 is rounded down to 3.7 4.23 is rounded down to 4.2 17.5178 is rounded down to 17.5 120.60124 is rounded down to 120.6 45.44008 is rounded down to 45.4

12 You round up to the nearest tenth if the hundredths digit is 5,6,7,8 or 9. 4.67 is rounded up to 4.7

13 You round up to the nearest tenth if the hundredths digit is 5,6,7,8 or 9. 4.67 is rounded up to 4.7 5.8577 is rounded up to 5.9

14 You round up to the nearest tenth if the hundredths digit is 5,6,7,8 or 9. 4.67 is rounded up to 4.7 5.8577 is rounded up to 5.9 17.7802 is rounded up to 17.8

15 You round up to the nearest tenth if the hundredths digit is 5,6,7,8 or 9. 4.67 is rounded up to 4.7 5.8577 is rounded up to 5.9 17.7802 is rounded up to 17.8 125.29 is rounded up to 125.3

16 You round up to the nearest tenth if the hundredths digit is 5,6,7,8 or 9. 4.67 is rounded up to 4.7 5.8577 is rounded up to 5.9 17.7802 is rounded up to 17.8 125.29 is rounded up to 125.3 46.36445 is rounded up to 46.4

17 Watch out for numbers which have 9 in the tenths column. e.g. 2.97 If you are rounding up, you will make 10 tenths. This makes 1 unit, so you have to round to the next whole number (in this case to 3).

18 Watch out for numbers which have 9 in the tenths column. e.g. 2.97 If you are rounding up, you will make 10 tenths. This makes 1 unit, so you have to round to the next whole number (in this case to 3). For the same reason, 23.964 becomes 24

19 Watch out for numbers which have 9 in the tenths column. e.g. 2.97 If you are rounding up, you will make 10 tenths. This makes 1 unit, so you have to round to the next whole number (in this case to 3). For the same reason, 23.964 becomes 24 12.9505 becomes 13

20 Watch out for numbers which have 9 in the tenths column. e.g. 2.97 If you are rounding up, you will make 10 tenths. This makes 1 unit, so you have to round to the next whole number (in this case to 3). For the same reason, 23.964 becomes 24 12.9505 becomes 13 And 6.98 becomes 7

21 That’s it for now......


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