题目内容
【题目】脱式计算。(能简算的要简算)
(6.9-3.15)÷0.3×0.8 0.175÷0.25÷4
[7.1-(1.56+2.54)]÷2.5 3.2×18-3.2×8
【答案】10;0.175;1.2;32
【解析】
(6.9-3.15)÷0.3×0.8
=3.75÷0.3×0.8
=12.5×0.8
=10
0.175÷0.25÷4
=0.175÷(0.25×4)
=0.175÷1
=0.175
[7.1-(1.56+2.54)]÷2.5
=[7.1-4.1]÷2.5
=3÷2.5
=1.2
3.2×18-3.2×8
=3.2×(18-8)
=3.2×10
=32
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