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脱式计算.(1)7/15*1/9+8/15/9(2)(7/9*1/6)*48(3)(7/8-5/16)*(5/9+2/3)(4)1-(1/4+3/8)/1/4
题目详情
脱式计算.
(1)7/15*1/9+8/15/9 (2)(7/9*1/6)*48
(3)(7/8-5/16)*(5/9+2/3) (4)【1-(1/4+3/8)】/1/4
(1)7/15*1/9+8/15/9 (2)(7/9*1/6)*48
(3)(7/8-5/16)*(5/9+2/3) (4)【1-(1/4+3/8)】/1/4
▼优质解答
答案和解析
(1)7/15×1/9+8/15÷9
=7/15×1/9+8/15×1/9
=1/9×(7/15+8/15)
=1/9×1
=1/9
(2)(7/9×1/6)×48
=48×1/6×7/9
=8×7/9
=56/9
(3)(7/8-5/16)×(5/9+2/3)
=9/16×11/9
=11/16
(4)[1-(1/4+3/8)]÷1/4
=[1-5/8]÷1/4
=3/8×4
=3/2
=7/15×1/9+8/15×1/9
=1/9×(7/15+8/15)
=1/9×1
=1/9
(2)(7/9×1/6)×48
=48×1/6×7/9
=8×7/9
=56/9
(3)(7/8-5/16)×(5/9+2/3)
=9/16×11/9
=11/16
(4)[1-(1/4+3/8)]÷1/4
=[1-5/8]÷1/4
=3/8×4
=3/2
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