| 计算(能简便的要简便) 40÷[(
85×0.75+15×75%
7.85-1.89-2.11+2.15 [1-(
24×(
|
(1)40÷[(
=40÷[
=40÷
=32; (2)85×0.75+15×75% =85×0.75+15×0.75, =(85+15)×0.75, =100×0.75, =75; (3)
=
=
=
(4)7.85-1.89-2.11+2.15 =7.85+2.15-(1.89+2.11), =10-4, =6; (5)[1-(
=[1-
=
=1; (6)24×(
=24×
=6+3-4, =5. |
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