Explanation Given information: The expression is 86.05 − 1.978 . Explanation: Use the following steps to subtract: 1) Write thesecond number below the first number as the decimal places are lined up. 2) Now, place a subtraction sign on the left of the second number. 3) Now, subtract as whole numbers. 86.05 − 1.978 _ Then, subtract the digits from right to left as whole numbers. Placing zero to the right of digits after the decimal in any number will not change any value. Now, insert zero to the right of 5 in the first number so that the digits can be line up neatly. 86.050 − 1.978 _ Subtract the third-place digits right to the decimal. Since 8 is larger than 0 , borrow 1 hundredth from 5 hundredths and add it to the 0 thousandths. Thus, 0 becomes 0 + 10 = 10 and 5 becomes 5 − 1 = 4 . 86.0 5 4 0 10 − 1.9 7 8 _ Subtract 8 from 10 , that is 10 − 8 = 2 . 86.0 5 4 0 10 − 1.9 7 8 _ 2 Subtract the second-place digits right to the decimal. Since 7 is larger than 4 , borrow 1 tenth from tenth place, but at tenth place there is 0 , so borrow 1 ones from ones place and add it to 0 tenths. 1 one = 10 tenths . Split 6 ones as 5 ones + 10 tenths . Split these 10 tenths as 9 tenths + 10 hundredths . Thus, at ones place digit 6 becomes 6 − 1 = 5 , and tenths place 0 becomes 0 + 10 − 1 = 9 , hundredths place 4 becomes 4 + 10 = 14 . 8 6 5 . 0 9 5 4 14 0 10 − 1 . 9 7 8 _ 2 Now, subtract 7 from 14 , that is 14 − 7 = 7 . 8 6 5 . 0 9 5 4 14 0 10 − 1

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ISBN: 9780134896014

Author: Martin-Gay

Publisher: PEARSON

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Chapter 4.3, Problem 41ES

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The subtraction, 86.05 − 1.978 .

Solution Summary: The author explains how to subtract 86.05-1.978 from 84.072.

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