【题目】脱式计算,能简算的要简算.
6.3×10.1
0.25×0.8×4×0.125
0.75×18÷0.15
2.5×3.7+6.3×2.5.
【答案】63.63,0.1,90,25
【解析】解:(1)6.3×10.1
=6.3×(10+0.1)
=6.3×10+6.3×0.1
=63+0.63
=63.63
(2)0.25×0.8×4×0.125
=(0.25×4)×(0.8×0.125)
=1×0.1
=0.1
(3)0.75×18÷0.15
=13.5÷0.15
=90
(4)2.5×3.7+6.3×2.5
=2.5×(3.7+6.3)
=2.5×10
=25
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