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What is 3 1/2 - 2 5/7 and show the work

User Vadzim
by
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2 Answers

3 votes

Hey there!


3 1/2 - 2 5/7

= (3 * 2 + 1 / 2) - (2 * 7 + 5 / 7)

= (6 + 1 / 2) - (14 + 5 / 7)

= 7/2 - 19/7

= 7/2 - 19/7

= 7 * 7 / 2 * 7 - 19 * 2 / 2 * 7

= 49/14 - 38/14

= 49 - 38 / 14 - 0

= 11 / 14


Therefore, your answer is: 11/14


Good luck on your assignment & enjoy your day!


~Amphitrite1040:)

User Chaniece
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6.8k points
4 votes

3 (1)/(2) -2 (5)/(7) = ((3\cdot2)+1)/(2) - ((2\cdot7)+5)/(7) = (7)/(2) - (19)/(7) \\\\= (7* 7)/(2* 7) - (19* 2)/(7* 2) = (49)/(14) - (38)/(14) \\\\= (49-38)/(14) =\boxed{\bf{(11)/(14)}}
User Terary
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7.3k points