问题
解答题
能简算的要简算 (1)3.2×1.25×0.25 (2)
(3)(
|
答案
(1)3.2×1.25×0.25,
=0.8×4×1.25×0.25,
=(0.8×1.25)×(4×0.25),
=1×1,
=1;
(2)
×101-31 50
,31 50
=
×(101-1),31 50
=
×100,31 50
=62;
(3)(
-7 8
)×(5 16
+5 9
),2 3
=
×9 16
,11 9
=
.11 16