4又1/2×40%+6.5*2/5-0.4简便运算

来源：学生作业帮助网编辑：六六作业网时间：2024/11/24 20:51:32

4又1/2×40%+6.5*2/5-0.4简便运算4又1/2×40%+6.5*2/5-0.4简便运算4又1/2×40%+6.5*2/5-0.4简便运算原式=4.5×0.4+6.5×0.4-0.4=（4

4又1/2×40%+6.5*2/5-0.4简便运算
4又1/2×40%+6.5*2/5-0.4简便运算

4又1/2×40%+6.5*2/5-0.4简便运算
原式
=4.5×0.4+6.5×0.4-0.4
=（4.5+6.5-1）×0.4
=10×0.4
=4