2/3-7/12+9/20-11/30+13/42-15/56简算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 13:40:10
![2/3-7/12+9/20-11/30+13/42-15/56简算](/uploads/image/z/131982-6-2.jpg?t=2%2F3-7%2F12%2B9%2F20-11%2F30%2B13%2F42-15%2F56%E7%AE%80%E7%AE%97)
2/3-7/12+9/20-11/30+13/42-15/56简算
2/3-7/12+9/20-11/30+13/42-15/56简算
2/3-7/12+9/20-11/30+13/42-15/56简算
2/3-7/12+9/20-11/30+13/42-15/56
=2/3-(1/3+1/4)+(1/4+1/5)-(1/5+1/6)+(1/6+1/7)-(1/7+1/8)
=2/3-1/3-1/8
=1/3-1/8
=5/24