423×9/25×33/4− 24/5×0.423×125=_.

问题描述:

423×

9
25
×3
3
4
− 2
4
5
×0.423×125=______.

423×

9
25
×3
3
4
-2
4
5
×
0.432×125
=423×
9
25
×3
3
4
-2
4
5
×
423×0.125;
=(
9
25
×
15
4
-
14
5
×
1
8
)×423;
=(
27
20
7
20
)×423;
=1×423;
=423;
故答案为:423.