用简便方法计算 1.5.1÷4+4.9×25% 2.2又5/1×0.75+2.2×4/1 要交的.快.
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 04:27:28
![用简便方法计算 1.5.1÷4+4.9×25% 2.2又5/1×0.75+2.2×4/1 要交的.快.](/uploads/image/z/65568-48-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97+1.5.1%C3%B74%2B4.9%C3%9725%25+2.2%E5%8F%885%2F1%C3%970.75%2B2.2%C3%974%2F1+%E8%A6%81%E4%BA%A4%E7%9A%84.%E5%BF%AB.)
用简便方法计算 1.5.1÷4+4.9×25% 2.2又5/1×0.75+2.2×4/1 要交的.快.
用简便方法计算 1.5.1÷4+4.9×25% 2.2又5/1×0.75+2.2×4/1 要交的.快.
用简便方法计算 1.5.1÷4+4.9×25% 2.2又5/1×0.75+2.2×4/1 要交的.快.
1.5.1÷4+4.9×25%
=5.1×0.25+4.9×0.25
=0.25(5.1+4.9)
=0.25×10
=2.5
2.2又5/1×0.75+2.2×4/1
=2.2×0.75+2.2×0.25
=2.2×(0.75+0.25)
=2.2