Question

A 18 and three fourths inch board is cut from a 38 and one fourth inch board. The saw cut takes three eighths inch. How much of the 38 and one fourth inch board is left after​ cutting?

Answer 1

18 7/8 in. left

Explanation:

18 3/4+ 3/8 +X= 38 combine like terms

19.125+ X= 38 subtract 19.125

X= 18.875 or X= 18 7/8

Answer 2

There is 19 1/8 inches left

Explanation:

We have a board that is 38 1/4 inches

We cut away 18 3/4

38 1/4

-18 3/4

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We need to borrow 38 becomes 37 and 1/4 gets the 1 and 4/4 + 1/4 = 5/4

38 1/4

-18 3/4

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We need to borrow because 7 is less than 8 2 becomes 1 and 7 becomes 17

2 17 5/4

-1 8 3/4

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1 9 2/4

The saw takes 3/8

19 2/4

- 3/8

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Get a common denominator of 8 2/4 * 2/2 = 4/8

19 4/8

- 3/8

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19 1/8

There is 19 1/8 inches left