题目内容
计算下列各题,能简算的要简算
|
|
| ||||||||||||||||
48×(
|
|
|
(1)
+
×
,
=
+
,
=
;
(2)
×(
+
),
=
×
,
=
;
(3)
×14-
,
=
×(14-1),
=
×13,
=12;
(4)48×(
-
),
=48×
-48×
,
=40-18,
=22;
(5)
+
×
,
=
+
,
=
;
(6)
-
+
,
=
+
-
,
=1-
,
=
.
2 |
5 |
4 |
5 |
7 |
4 |
=
2 |
5 |
7 |
5 |
=
9 |
5 |
(2)
5 |
8 |
3 |
4 |
9 |
20 |
=
5 |
8 |
24 |
20 |
=
3 |
4 |
(3)
12 |
13 |
12 |
13 |
=
12 |
13 |
=
12 |
13 |
=12;
(4)48×(
5 |
6 |
3 |
8 |
=48×
5 |
6 |
3 |
8 |
=40-18,
=22;
(5)
1 |
4 |
3 |
68 |
51 |
5 |
=
1 |
4 |
9 |
20 |
=
7 |
10 |
(6)
9 |
20 |
2 |
15 |
11 |
20 |
=
9 |
20 |
11 |
20 |
2 |
15 |
=1-
2 |
15 |
=
13 |
15 |
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