题目内容
| 怎样简便就怎样做. (
| (9×
| ||||||||||||
3-
| 10÷
|
(1)(
-
)÷
,
=(
-
)×28,
=
×28-
×28,
=24-21,
=3;
(2)(9×
-
)÷
,
=(
-
)÷
,
=
÷
,
=
;
(3)3-
×
-
,
=3-
-
,
=3-(
+
),
=3-1,
=2;
(4)10÷
+
×4,
=18+
,
=18
.
| 6 |
| 7 |
| 3 |
| 4 |
| 1 |
| 28 |
=(
| 6 |
| 7 |
| 3 |
| 4 |
=
| 6 |
| 7 |
| 3 |
| 4 |
=24-21,
=3;
(2)(9×
| 5 |
| 6 |
| 73 |
| 10 |
| 2 |
| 5 |
=(
| 15 |
| 2 |
| 73 |
| 10 |
| 2 |
| 5 |
=
| 1 |
| 5 |
| 2 |
| 5 |
=
| 1 |
| 2 |
(3)3-
| 3 |
| 2 |
| 10 |
| 21 |
| 2 |
| 7 |
=3-
| 5 |
| 7 |
| 2 |
| 7 |
=3-(
| 5 |
| 7 |
| 2 |
| 7 |
=3-1,
=2;
(4)10÷
| 5 |
| 9 |
| 1 |
| 6 |
=18+
| 2 |
| 3 |
=18
| 2 |
| 3 |
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