题目内容

【题目】下列各题,能简便的要用简便方法计算。

(1)4×0.6+0.6÷

(2)÷[×(+)]

(3)36×(-)+15

(4)9-(-)-

(5)0.25×1.25×320

(6)2.3×2.75+6.7×2.75+2.75

【答案】(1)4.8;(2);(3)16;(4)9;(5)100;(6)27.5

【解析】

(1)解:4×0.6+0.6÷

=2.4+2.4

=4.8

(2)解:÷[×(+)]

=÷[×]

=÷

=

(3)解:36×(-)+15

=36×-36×+15

=16-15+15

=16

(4)解:9-(-)-

=9-+-

=(9+)-(+)

=10-1

=9

(5)解:0.25×1.25×320

=(0.25×40)×(1.25×8)

=10×10

=100

(6)解:2.3×2.75+6.7×2.75+2.75

=(2.3+6.7+1)×2.75

=10×2.75

=27.5

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