Question

括号十三分之二加十七分之三括号乘十三乘十七用简便方法怎么做，百分之70+1/2÷4加35%简算？

Answer 1

（2/13十3/17）X13x17二2/13x13X17十3/17×17X13二2×17十3X13二34十39二75
70%十1/2÷4十35%二70%十35%十1/2÷4二105%十1/8二105%十12.5%二117.5%

Answer 2

用乘法分配律可以简算
(+17 3×13×17
13 2x13x17+17 3×13×17100
=34+39
=73

Answer 3

（2/13+3/17）×13×17
=2/13×13×17+3/17×13×17
=2×17+3×13
=34+39
=33+1+39
=33+40
=73
70%+1/2÷4+35%
=70%+30%+5%+1/2×1/4
=1+0.05+1/8
=1+0.05+0.125
=1.175