作业帮没做的要简便运算,怎么简便啊!
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/08 20:43:52
没做的要简便运算,怎么简便啊!
没做的要简便运算,怎么简便啊!
没做的要简便运算,怎么简便啊!
1.(7/8)x(1/4)+0.25x0.125=(7/8)x(1/4)+(1/4)x(1/8)
=(1/4)x[(7/8)+(1/8)]
=(1/4)x1
=1/4.
2.0.625x5.8+(5/8)x3.2+(5/8)
=(5/8)x5.8+(5/8)x3.2+(5/8)
=(5/8)x(5.8+3.2+1)
=(5/8)x10
=0.625x10
=6.25.
3.21x(1/8)+48x12.5%+11x(1/8)
=21x(1/8)+48x(1/8)+11x(1/8)
=(21+48+11)x(1/8)
=80x(1/8)
=10.
4.(1/15+2/17)x15x17
=(1/15)x15x17+(2/17)x15x17
=17+30
=47.
5.[(12/7)x7/24)+(2/3)]x(7/3)
=[(1/2)+(2/3)]x(7/3)
=(7/6)+(14/9)
=(21/18)+(28/18)
=48/18
=8/3.