问题
解答题
简便计算 17×(
1.25×3.2×0.25 7
|
答案
(1)17×(
+3 17
)×18-40,7 18
=17×
×18+17×3 17
×18-40,7 18
=54+119-40,
=173-40,
=133;
(2)1.25×3.2×0.25,
=(1.25×0.8)×(4×0.25),
=1×1,
=1;
(3)7
-(3.875-2.64),7 8
=7.875-3.875+2.64,
=4+2.64,
=6.64;