题目内容
【题目】计算下面各题,能简算的要简算.
0.78÷0.25×4
0.25×12.5×3.2
2.05÷0.82+4.17.
【答案】(1)0.78÷0.25×4
=3.12×4
=12.48
(2)0.25×12.5×3.2
=0.25×12.5×4×0.8
=(0.25×4)×(12.5×0.8)
=1×10
=10
(3)2.05÷0.82+4.17
=2.5+4.17
=6.67
【解析】解:(1)0.78÷0.25×4
=3.12×4
=12.48
(2)0.25×12.5×3.2
=0.25×12.5×4×0.8
=(0.25×4)×(12.5×0.8)
=1×10
=10
(3)2.05÷0.82+4.17
=2.5+4.17
=6.67
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