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:作业帮 时间:2024/06/22 03:15:41
![4又1/2×40%+6.5*2/5-0.4简便运算](/uploads/image/z/753686-62-6.jpg?t=4%E5%8F%881%2F2%C3%9740%25%2B6.5%2A2%2F5-0.4%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
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
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 03:15:41
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