题目内容
【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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