Adding and Subtracting Decimals Check- Point

What is the rule for adding or subtracting decimals?

• Add first

• Line up the decimals first, then fill in with zeros.

• Move the decimal to the right the total amount of numbers after the decimal.

• Subtract

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CCSS.5.NBT.B.7

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CCSS.5.NBT.B.7

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CCSS.5.NBT.A.1

CCSS.5.NBT.A.3

CCSS.5.NBT.A.4

Find the difference.

123.6 - 0.08

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CCSS.5.NBT.B.7

Find the sum.

2.98 + 5.3 = ____

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CCSS.5.NBT.A.3

CCSS.5.NBT.B.7

Where would the decimal go in the whole number to add or subtract with decimals: 25

• .25

• 2.5

• 25.

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CCSS.5.NBT.A.3

CCSS.5.NBT.B.7

Ned and Sarah were running a relay race. The race was 22.01 kilometers total. If Ned ran 9.41 kilometers how far did Sarah run?

• 12.60 km

• 31.42 km

• 27.41 km

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CCSS.5.NBT.B.7

CCSS.5.NF.A.2

A weatherman was measuring the amount of rain two cities received over a week. City A received 3.74 inches while City B received 9.8 inches. How much rain did they get in total?

• 13.54 inches

• 6.06 inches

• 7 days

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CCSS.5.NBT.B.7

Roughly, approximately, and about are all clues for knowing when to round or estimate.

• True

• False

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CCSS.5.NBT.A.4

Estimating is finding a value that is CLOSE or APPROXIMATE to the actual value, but it's not exact.

• True

• False

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CCSS.5.NBT.A.4

CCSS.5.NF.A.2