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1/8x5+5/8x5+1/8x101/7x3/4+3/7x1/6+6/7x1/122/1263道,是简便计算.
题目详情
1/8x5+5/8x5+1/8x10 1/7x3/4+3/7x1/6+6/7x1/12 2/126 3道,是简便计算.
▼优质解答
答案和解析
1/8x5+5/8x5+1/8x10
=5/8+5/8x5+5/8x2
=5/8x(1+5+2)
=5/8x8
=5
1/7x3/4+3/7x1/6+6/7x1/12
=3/7x1/4+3/7x1/6+3/7x1/6
=3/7x(1/4+1/6+1/6)
=3/7 x7/12
=1/4
2/126
=2/(2x63)
=1/63
=5/8+5/8x5+5/8x2
=5/8x(1+5+2)
=5/8x8
=5
1/7x3/4+3/7x1/6+6/7x1/12
=3/7x1/4+3/7x1/6+3/7x1/6
=3/7x(1/4+1/6+1/6)
=3/7 x7/12
=1/4
2/126
=2/(2x63)
=1/63
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