题目内容
简便计算. ①0.8×7.7+2.3×0.8 |
②36×10.1. |
分析:①0.8×7.7+2.3×0.8,运用乘法分配律进行简算;
②36×10.1,运用乘法分配律进行简算.
②36×10.1,运用乘法分配律进行简算.
解答:解:①0.8×7.7+2.3×0.8,
=0.8×(7.7+2.3),
=0.8×10,
=8;
②36×10.1,
=36×10+36×0.1,
=360+3.6,
=363.6.
=0.8×(7.7+2.3),
=0.8×10,
=8;
②36×10.1,
=36×10+36×0.1,
=360+3.6,
=363.6.
点评:此题考查的目的是理解掌握乘法分配律的意义,并且能够运用乘法分配律对小数四则混合运算进行简便计算.
练习册系列答案
相关题目