题目内容
用简便方法计算.(要写出简算过程)
①10.8-5.9-4.1
②
×8+8×
.
①10.8-5.9-4.1
②
| 3 |
| 4 |
| 1 |
| 4 |
①10.8-5.9-4.1,
=10.8-(5.9+4.1),
=10.8-10,
=0.8;
②
×8+8×
,
=8×(
+
),
=8×1,
=8.
=10.8-(5.9+4.1),
=10.8-10,
=0.8;
②
| 3 |
| 4 |
| 1 |
| 4 |
=8×(
| 3 |
| 4 |
| 1 |
| 4 |
=8×1,
=8.
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