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Step-by-step explanation:
1) 2/49-6/7 = 2/49 - 41/49 = -39/49
2) 4/9 - 5/36 = 16/36 - 5/36 = 11/36
3) -3/8 × -32/15 = 3/8 × 32/15 = 1/1 × 4/5 = 4/5
4) -78/143 × 55/26 = -4290/3718
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Answer:
1) 2/49-6/7 (LCM=49)
=2-42/49=-40/49=Ans
2) 4/9-5/36 (LCM=36)
=16-5/36=11/36=Ans
3)-3/8×-32/15
=-1/1×-4/5= 4/5=Ans
4)-78/143×55/26
=-3/13×55/1=3×55/13=165/13=Ans
Step-by-step explanation:
I hope it helps you....