Help me Please..............

Question

Help me Please..............

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Answer 1

1) 50*2=100, 100 * 6,28=628
2) -4 * ( -25) = 100, 100* 1,8=180
3) 3 3/7= 11/3, 11/3 * (-3/11)=-1, -1*7=-7
4) -5 1/8= -41/8, -41/8 * (-16/41)=2, 2 * 4=8