题目内容
能简算的要简算
(
|
| 40%×
|
(1)(
-
)×
÷
,
=(
-
)×
×
,
=
×
×
,
=
;
(2)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(3)40%×
+0.45×70%-45%×0.1,
=40%×0.45+0.45×70%-0.45×0.1,
=0.45×(40%+70%-0.1),
=0.45×(1.1-0.1),
=0.45.
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 5 |
| 9 |
| 10 |
=(
| 4 |
| 6 |
| 3 |
| 6 |
| 3 |
| 5 |
| 10 |
| 9 |
=
| 1 |
| 6 |
| 3 |
| 5 |
| 10 |
| 9 |
=
| 1 |
| 9 |
(2)
| 11 |
| 12 |
| 1 |
| 6 |
| 5 |
| 6 |
| 11 |
| 12 |
=
| 11 |
| 12 |
| 1 |
| 6 |
| 5 |
| 6 |
=
| 11 |
| 12 |
=
| 11 |
| 12 |
(3)40%×
| 9 |
| 20 |
=40%×0.45+0.45×70%-0.45×0.1,
=0.45×(40%+70%-0.1),
=0.45×(1.1-0.1),
=0.45.
练习册系列答案
相关题目