计算下面各题,能简算的要简算。 (1)3.8X4.2+38X0.58 (2)36[(5/6-2/3
计算下面各题,能简算的要简算。(1)3.8X4.2+38X0.58(2)36[(5/6-2/3)X3](3)1.25X32X2.5(4)72000÷125÷8...
计算下面各题,能简算的要简算。
(1)3.8X4.2+38X0.58
(2)36[(5/6-2/3)X3]
(3)1.25X32X2.5
(4)72000÷125÷8 展开
(1)3.8X4.2+38X0.58
(2)36[(5/6-2/3)X3]
(3)1.25X32X2.5
(4)72000÷125÷8 展开
3个回答
2016-04-30 · 知道合伙人教育行家
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(1)3.8X4.2+38X0.58
=38X0.42+38X0.58
=38X(0.42+0.58)
=38X1
=38
(2)36×[(5/6-2/3)X3]
=36×[1/6X3]
=36×1/2
=18
(3)1.25X32X2.5
=(1.25X8)X(4X2.5)
=10X10
=100
(4)72000÷125÷8
=72000÷(125X8)
=72000÷1000
=72
=38X0.42+38X0.58
=38X(0.42+0.58)
=38X1
=38
(2)36×[(5/6-2/3)X3]
=36×[1/6X3]
=36×1/2
=18
(3)1.25X32X2.5
=(1.25X8)X(4X2.5)
=10X10
=100
(4)72000÷125÷8
=72000÷(125X8)
=72000÷1000
=72
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