题目内容
用你喜欢的方法计算.
(1)230-2.6×1.5
(2)36×(
+
)
(3)2÷
-
÷2
(4)42÷[14-(50-39)].
(1)230-2.6×1.5
(2)36×(
| 2 |
| 9 |
| 7 |
| 12 |
(3)2÷
| 2 |
| 3 |
| 2 |
| 3 |
(4)42÷[14-(50-39)].
(1)230-2.6×1.5,
=230-3.9,
=226.1;
(2)36×(
+
),
=36×
+
×36,
=8+21,
=29;
(3)2÷
-
÷2,
=3-
,
=2
;
(4)42÷[14-(50-39)],
=42÷[14-11],
=42÷3,
=14.
=230-3.9,
=226.1;
(2)36×(
| 2 |
| 9 |
| 7 |
| 12 |
=36×
| 2 |
| 9 |
| 7 |
| 12 |
=8+21,
=29;
(3)2÷
| 2 |
| 3 |
| 2 |
| 3 |
=3-
| 1 |
| 3 |
=2
| 2 |
| 3 |
(4)42÷[14-(50-39)],
=42÷[14-11],
=42÷3,
=14.
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