题目内容
脱式计算.
23-
|
| 2-
| (4-3×
|
(1)23-
×
÷
,
=23-
×
×7,
=23-
,
=20
;
(2)
+
×
+
,
=
+
+
,
=
+
+
,
=
;
(3)2-
÷
-
,
=2-
×
-
,
=2-
-
,
=2-(
+
),
=2-1,
=1;
(4)(4-3×
)÷
,
=(4-2)×9,
=2×9,
=18.
| 8 |
| 9 |
| 3 |
| 8 |
| 1 |
| 7 |
=23-
| 8 |
| 9 |
| 3 |
| 8 |
=23-
| 7 |
| 3 |
=20
| 2 |
| 3 |
(2)
| 2 |
| 9 |
| 5 |
| 9 |
| 3 |
| 5 |
| 3 |
| 8 |
=
| 2 |
| 9 |
| 1 |
| 3 |
| 3 |
| 8 |
=
| 16 |
| 72 |
| 24 |
| 72 |
| 27 |
| 72 |
=
| 67 |
| 72 |
(3)2-
| 6 |
| 17 |
| 15 |
| 34 |
| 1 |
| 5 |
=2-
| 6 |
| 17 |
| 34 |
| 15 |
| 1 |
| 5 |
=2-
| 4 |
| 5 |
| 1 |
| 5 |
=2-(
| 4 |
| 5 |
| 1 |
| 5 |
=2-1,
=1;
(4)(4-3×
| 2 |
| 3 |
| 1 |
| 9 |
=(4-2)×9,
=2×9,
=18.
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