题目内容
用简便方法计算.
(1)
| (2)46.5-3.6-6.4+3.5. |
(1)
×
+
÷
,
=
×
+
×
,
=
×(
+
),
=
×
,
=
;
(2)46.5-3.6-6.4+3.5,
=(46.5+3.5)-(3.6+6.4),
=50-10,
=40;
| 5 |
| 12 |
| 2 |
| 5 |
| 4 |
| 5 |
| 12 |
| 5 |
=
| 5 |
| 12 |
| 2 |
| 5 |
| 4 |
| 5 |
| 5 |
| 12 |
=
| 5 |
| 12 |
| 2 |
| 5 |
| 4 |
| 5 |
=
| 5 |
| 12 |
| 6 |
| 5 |
=
| 1 |
| 2 |
(2)46.5-3.6-6.4+3.5,
=(46.5+3.5)-(3.6+6.4),
=50-10,
=40;
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