数学简算那,我急死了,高手来吧①（7/12*3/4 - 知识问答

数学简算那,我急死了,高手来吧①（7/12*3/4-1/3）*4/5 ②3/4*5/14+3/10÷12 ③（3/7-3

1个回答

（1）(7/12*3/4-1/3)*4/5
=7/12*3/4*4/5-1/3*4/5
=21/60-4/15
=21/60-16/60
=5/60
=1/12
(2)3/4*5/14+3/10/12
=15/56+1/40
=41/140
(3)(3/7-3/7*7/8)/1/2
=3/7*(1-7/8)*2
=3/7*1/8*2
=3/28

相关问题