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Published byJason Casey Modified over 8 years ago

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

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

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**For you notebook (copy this):**

Rounding Decimals: to round a decimal to a given place value, look at the digit in the place to the right. If the digit is 4 or less, round down. If the digit is 5 or greater, round up.

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**First look at the value of the digit in the hundredths column**

4.675 Has 7 hundredths

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**First look at the value of the digit in the hundredths column**

4.675 Has 7 hundredths 5.85 Has 5 hundredths

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**First look at the value of the digit in the hundredths column**

4.675 Has 7 hundredths 5.85 Has 5 hundredths Has 2 hundredths 3.7298

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**First look at the value of the digit in the hundredths column**

4.675 Has 7 hundredths 5.85 Has 5 hundredths Has 2 hundredths 3.7298 Has 3 hundredths

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**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

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**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

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**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 is rounded down to 17.5

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**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 is rounded down to 17.5 is rounded down to 120.6

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**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 is rounded down to 17.5 is rounded down to 120.6 is rounded down to 45.4

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**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

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**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 is rounded up to 5.9

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**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 is rounded up to 5.9 is rounded up to 17.8

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**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 is rounded up to 5.9 is rounded up to 17.8 is rounded up to 125.3

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**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 is rounded up to 5.9 is rounded up to 17.8 is rounded up to 125.3 is rounded up to 46.4

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**Watch out for numbers which have 9 in the tenths column.**

e.g 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).

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**Watch out for numbers which have 9 in the tenths column.**

e.g 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, becomes 24

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**Watch out for numbers which have 9 in the tenths column.**

e.g 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, becomes 24 becomes 13

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**Watch out for numbers which have 9 in the tenths column.**

e.g 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, becomes 24 becomes 13 And 6.98 becomes 7

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EXAMPLE 1 Using a Number Line to Round Use a number line to round 3.87 to the nearest tenth.

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EXAMPLE 1 Using a Number Line to Round Use a number line to round 3.87 to the nearest tenth.

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EXAMPLE 1 Using a Number Line to Round Use a number line to round 3.87 to the nearest tenth. ANSWER

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EXAMPLE 1 Using a Number Line to Round Use a number line to round 3.87 to the nearest tenth. ANSWER The decimal 3.87 rounds up to 3.9.

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GUIDED PRACTICE for Example 1 Use a number line to round the decimal as specified.

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GUIDED PRACTICE for Example 1 Use a number line to round the decimal as specified. (nearest one)

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**Use a number line to round the decimal as specified.**

GUIDED PRACTICE for Example 1 Use a number line to round the decimal as specified. (nearest one)

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**Use a number line to round the decimal as specified.**

GUIDED PRACTICE GUIDED PRACTICE for Example 1 Use a number line to round the decimal as specified. (nearest one) The decimal 1.3 is closer to 1 than to 3

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**Use a number line to round the decimal as specified.**

GUIDED PRACTICE GUIDED PRACTICE for Example 1 Use a number line to round the decimal as specified. (nearest one) The decimal 1.3 is closer to 1 than to 3 ANSWER The decimal 1.3 rounds down to 1.

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That’s it for now......

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