问题
解答题
计算下列各题.
12.5×0.32×2.5(简算) 4.8×(11.08-15.6÷7.5) (
|
答案
(1)
×4 9
+3 7
÷4 9
,7 4
=
×4 9
+3 7
×4 9
,4 7
=(
+3 7
)×4 7
,4 9
=1×
,4 9
=
;4 9
(2)12.5×0.32×2.5,
=12.5×0.8×0.4×2.5,
=(12.5×0.8)×(0.4×2.5),
=10×1,
=10;
(3)4.8×(11.08-15.6÷7.5),
=4.8×(11.08-2.08),
=4.8×9,
=43.2;
(4)(
-3 4
)÷2 3
×2 3
,1 6
=(
-9 12
)×8 12
×3 2
,1 6
=
×1 12
,1 4
=
.1 48