rearrange and find the sum of -13/20+11/14+(-5/7)+7/10
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Arrange the numbers in couple.
2,4 → 2 *2 = 4
8,7 → 8–7 = 1
5,10 → 5*2 =10
11,10 → 11–10 =1
2,4 → 2 *2 = 4
8,7 → 8–7 = 1
5,10 → 5*2 =10
11,10 → 11–10 =1
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