题目内容
计算下面各题,能简算的要简算.
|
| (
| ||||||||||||||||||||
23×
|
|
(1)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(2)
×
×
=
;
(3)(
+
)÷
,
=(
+
)×56,
=
×56+
×56,
=21+32,
=53;
(4)23×
,
=(22+1)×
,
=22×
+1×
,
=13+
,
=13
;
(5)
÷[
-(
+
)],
=
÷[
-
-
],
=
÷[-
],
=-
×
,
=-
.
| 2 |
| 13 |
| 5 |
| 9 |
| 4 |
| 9 |
| 2 |
| 13 |
=
| 2 |
| 13 |
| 5 |
| 9 |
| 4 |
| 9 |
=
| 2 |
| 13 |
=
| 2 |
| 13 |
(2)
| 5 |
| 12 |
| 7 |
| 9 |
| 4 |
| 5 |
| 7 |
| 27 |
(3)(
| 3 |
| 8 |
| 4 |
| 7 |
| 1 |
| 56 |
=(
| 3 |
| 8 |
| 4 |
| 7 |
=
| 3 |
| 8 |
| 4 |
| 7 |
=21+32,
=53;
(4)23×
| 13 |
| 22 |
=(22+1)×
| 13 |
| 22 |
=22×
| 13 |
| 22 |
| 13 |
| 22 |
=13+
| 13 |
| 22 |
=13
| 13 |
| 22 |
(5)
| 5 |
| 14 |
| 7 |
| 28 |
| 1 |
| 4 |
| 2 |
| 7 |
=
| 5 |
| 14 |
| 7 |
| 28 |
| 7 |
| 28 |
| 2 |
| 7 |
=
| 5 |
| 14 |
| 2 |
| 7 |
=-
| 5 |
| 14 |
| 7 |
| 2 |
=-
| 5 |
| 4 |
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