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Decimal Operations

Decimal Operations. 1. 1. 27.4. 0. 9.87. Add trailing zeros to assist with place value identification (optional step). 2. 7. . Bring down decimal point. Final Answer. 37.27. Adding Decimal Numbers. Align vertically with decimal points to maintain place values. +. 3. 7.

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Decimal Operations

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  1. Decimal Operations

  2. 1 1 27.4 0 9.87 • Add trailing zeros to assist • with place value identification • (optional step) 2 7 . • Bring down decimal point Final Answer 37.27 Adding Decimal Numbers • Align vertically with decimal points • to maintain place values + 3 7 • Add and carryasnormal .

  3. 13 10 3 6 27.4 0 5.87 • Add trailing zeros to assist • with place value identification and borrowing . 5 3 • Bring down decimal point Final Answer 21.53 Subtracting Decimal Numbers • Align vertically with decimal points • to maintain place values - 2 1 • Borrow and subtractasnormal .

  4. 3.74 • Multiply the top factor by the ‘apparent’ ones place value in the bottom factor 7.3 x 1122 + 2618 • Multiply the top factor by the ‘apparent’ tens place value in the bottom factor. • BE SURE to shift the product by one place value (factor of 10). • Repeat for each additional place value in the bottom factor. . 27302 Final Answer • Add the individual products 27.302 • Place decimal point one place to the left for every decimal place value in the two factors. Multiplying Decimal Numbers • Ignore decimal points .

  5. Rewrite using the long division box . 4 • Shift the decimal in the divisor to make the divisor a whole number. 3 7 7.3 27.302 • Then shift the decimal the same number of spaces in the dividend. - 219 0 54 • Move the decimal point straight up to the quotient line. - - 511 2 29 0 292 Final Answer 3.74 Dividing Decimal Numbers 27.302 ÷ 7.3 • Now ignore the decimal. Treat as whole numbers • Do the long division one step at a time. Pay close attention to alignment of columns (place value). Use graph paper if necessary. .

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