简便算法(要过程)1375+450÷18 (36×17-12)÷15 28×[(201-77)÷7分之2] (2.5-0.125)×0.8+6.24

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简便算法(要过程)1375+450÷18 (36×17-12)÷15 28×[(201-77)÷7分之2] (2.5-0.125)×0.8+6.24
简便算法(要过程)
1375+450÷18 (36×17-12)÷15
28×[(201-77)÷7分之2] (2.5-0.125)×0.8+6.24

简便算法(要过程)1375+450÷18 (36×17-12)÷15 28×[(201-77)÷7分之2] (2.5-0.125)×0.8+6.24
1375+450÷18
=1375+25
=1400;
(36×17-12)÷15
=12×(3×17-1)÷15
=12÷50÷15
=40;
28×[(201-77)÷7分之2]
=28×(124)×(7/2)
=14×7×124
=12152;
(2.5-0.125)×0.8+6.24
=2.5×0.8-0.125×0.8+6.24
=2-0.1+6.24
=8.14;
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