题目内容
37.5×3×0.112+35.5×12.5×0.224= .
考点:四则混合运算中的巧算
专题:计算问题(巧算速算)
分析:因为37.5=12.5×3,原题变为12.5×3×3×0.112+35.5×12.5×0.224,运用乘法分配律简算.
解答:
解:37.5×3×0.112+35.5×12.5×0.224
=12.5×3×3×0.112+35.5×12.5×0.224
=12.5×0.112×(3×3+35.5×2)
=12.5×0.112×80
=(12.5×80)×0.112
=1000×0.112
=112
故答案为:112.
=12.5×3×3×0.112+35.5×12.5×0.224
=12.5×0.112×(3×3+35.5×2)
=12.5×0.112×80
=(12.5×80)×0.112
=1000×0.112
=112
故答案为:112.
点评:此题解答的关键是发现37.5=12.5×3,运用乘法分配律简算.
练习册系列答案
相关题目