题目内容
用简便方法计算
①0.58+
+1.12+
②11-
-
.
①0.58+
| 5 |
| 13 |
| 8 |
| 13 |
②11-
| 4 |
| 11 |
| 7 |
| 11 |
①0.58+
+1.12+
,
=(0.58+1.12)+(
+
),
=1.7+1,
=2.7;
②11-
-
,
=11-(
+
),
=11-1,
=10.
| 5 |
| 13 |
| 8 |
| 13 |
=(0.58+1.12)+(
| 5 |
| 13 |
| 8 |
| 13 |
=1.7+1,
=2.7;
②11-
| 4 |
| 11 |
| 7 |
| 11 |
=11-(
| 4 |
| 11 |
| 7 |
| 11 |
=11-1,
=10.
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