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:2024/12/25 15:57:36
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