A-A+
(1)(225×3.75÷157)+(13+23÷229÷3)(2)(1-12+13-14+
问题详情
(1)(
(2)(1-
(3)(3.6×
(4)2
参考答案
(1)(225×3.75÷157)+(13+23÷229÷3)
=(225×154×712)+(13+23×920×13)
=958+(13+110)
=958+1330
=107120;
(2)(1-12+13-14+15)×(415×125÷415)
=(1-3060+2060-1560+1260)×(415×75×154)
=4760×415×75×154
=129300;
(3)(3.6×120-24÷200)÷115+114×0.2
=(3.6×0.05-24÷200)÷1.2+3.75×0.2
=(0.18-0.12)÷1.2+0.75
=0.06÷1.2+0.75
=0.05+0.75
=0.8;
(4)212+0.039÷[120×(2.31÷0.077)]-0.526
=2.5+0.039÷[0.05×30]-0.526
=2.5+0.039÷1.5-0.526
=2.5+0.026-0.526
=2.
考点: