题目内容
计算下面各题,能简算的要简算
|
| ||||||||||||||
9×
|
30×(
|
(1)
×
÷
,
=
×
×
,
=
×
,
=
;
(2)
+
×
-
,
=
+
-
,
=
-
,
=
;
(3)9×
+
÷9,
=
+
,
=
;
(4)30×(
+
-
),
=30×
+30×
-30×
,
=15+6-5,
=21-5,
=16.
| 5 |
| 9 |
| 3 |
| 5 |
| 2 |
| 9 |
=
| 5 |
| 9 |
| 3 |
| 5 |
| 9 |
| 2 |
=
| 1 |
| 3 |
| 9 |
| 2 |
=
| 3 |
| 2 |
(2)
| 4 |
| 15 |
| 5 |
| 7 |
| 21 |
| 25 |
| 1 |
| 5 |
=
| 4 |
| 15 |
| 3 |
| 5 |
| 1 |
| 5 |
=
| 13 |
| 15 |
| 1 |
| 5 |
=
| 2 |
| 3 |
(3)9×
| 9 |
| 11 |
| 9 |
| 11 |
=
| 81 |
| 11 |
| 1 |
| 11 |
=
| 82 |
| 11 |
(4)30×(
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 6 |
=30×
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 6 |
=15+6-5,
=21-5,
=16.
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