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What is a decimal?

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A decimal is a way of representing fractions using a point (decimal point) to separate the whole number part from the fractional part. For example, 0.5 represents 5 tenths.

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CCSS.4.NF.C.6

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How do you add decimals?

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To add decimals, align the numbers by the decimal point and add as you would whole numbers, carrying over if necessary.

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CCSS.5.NBT.B.7

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How do you subtract decimals?

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To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, borrowing if necessary.

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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.B.7

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How do you multiply decimals?

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To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

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CCSS.6.NS.B.3

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CCSS.6.NS.B.3

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CCSS.6.NS.B.3

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CCSS.5.NBT.B.7

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CCSS.7.EE.B.3