题目内容
脱式计算:
| (1)205×28-3930 | (2)
| ||||||||||||||||
(3)(
| (4)
|
(1)205×28-3930,
=5740-3930,
=1810;
(2)
×(
+
),
=
×
+
×
),
=
+
,
=
;
(3)(
-
)÷(
+
),
=
÷
,
=
;
(4)
×[
÷(
-
)],
=
×[
÷
],
=
×4,
=3.
=5740-3930,
=1810;
(2)
| 7 |
| 11 |
| 2 |
| 3 |
| 4 |
| 7 |
=
| 7 |
| 11 |
| 2 |
| 3 |
| 7 |
| 11 |
| 4 |
| 7 |
=
| 14 |
| 33 |
| 4 |
| 11 |
=
| 26 |
| 33 |
(3)(
| 5 |
| 6 |
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 6 |
=
| 1 |
| 12 |
| 5 |
| 12 |
=
| 1 |
| 5 |
(4)
| 3 |
| 4 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 3 |
| 4 |
| 1 |
| 3 |
| 1 |
| 12 |
=
| 3 |
| 4 |
=3.
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