问题
解答题
计算,能简算的要写出简算过程.
|
答案
①24×(
-13 8
),3 12
=45×0.375+56×0.375-0.375, =0.375×(45+56-1), =0.375×100, =37.5; ③[1-( =[1- = = ④ = = =2-1, =1; |
3 |
8 |
3 |
5 |
=
×8×3 8
×5,5 3
=25;
⑥
×(13 18
×17+9 18
),9 18
=
×[13 18
×(17+1)],9 18
=
×[13 18
×18],9 18
=
×9,13 18
=
.13 2