作业帮计算下列各题,能简算要简算(脱式计算）（1）7/8-5/6*9/10 （2）3/4÷（1-1/2-3/8) (3) 2-8/9*2/7*3/8 (4) 7/15÷[1-(4/5-2/3)] (5) 1/4+(5/8-3/10)*1/13
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/11 20:51:13
![计算下列各题,能简算要简算(脱式计算）（1）7/8-5/6*9/10 （2）3/4÷（1-1/2-3/8) (3) 2-8/9*2/7*3/8 (4) 7/15÷[1-(4/5-2/3)] (5) 1/4+(5/8-3/10)*1/13](/uploads/image/z/1962319-31-9.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E5%88%97%E5%90%84%E9%A2%98%2C%E8%83%BD%E7%AE%80%E7%AE%97%E8%A6%81%E7%AE%80%E7%AE%97%28%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%97%EF%BC%89%EF%BC%881%EF%BC%897%2F8-5%2F6%2A9%2F10+%EF%BC%882%EF%BC%893%2F4%C3%B7%EF%BC%881-1%2F2-3%2F8%29+%283%29+2-8%2F9%2A2%2F7%2A3%2F8+%284%29+7%2F15%C3%B7%5B1-%284%2F5-2%2F3%29%5D+%285%29+1%2F4%2B%285%2F8-3%2F10%29%2A1%2F13)
计算下列各题,能简算要简算(脱式计算）（1）7/8-5/6*9/10 （2）3/4÷（1-1/2-3/8) (3) 2-8/9*2/7*3/8 (4) 7/15÷[1-(4/5-2/3)] (5) 1/4+(5/8-3/10)*1/13
计算下列各题,能简算要简算(脱式计算）
（1）7/8-5/6*9/10 （2）3/4÷（1-1/2-3/8) (3) 2-8/9*2/7*3/8 (4) 7/15÷[1-(4/5-2/3)] (5) 1/4+(5/8-3/10)*1/13
计算下列各题,能简算要简算(脱式计算）（1）7/8-5/6*9/10 （2）3/4÷（1-1/2-3/8) (3) 2-8/9*2/7*3/8 (4) 7/15÷[1-(4/5-2/3)] (5) 1/4+(5/8-3/10)*1/13
7/8-5/6*9/10
=7/8-3/4
=7/8-6/8
=1/8
3/4÷（1-1/2-3/8)
=(3/4×8)÷[(1-1/2-3/8)×8]
=6÷(8-4-3)
=6÷1
=6
2-8/9*2/7*3/8
=2-2/21
=40/21
7/15÷[1-(4/5-2/3)]
=7/15÷(1-4/5+2/3)
=(7/15×15)÷[(1-4/5+2/3)×15]
=7÷(15-12+10)
=7÷13
=7/13
1/4+(5/8-3/10)*1/13
=1/4+(25/40-12/40)*1/13
=1/4+13/40*1/13
=1/4+1/40
=10/40+1/40
=11/40