题目内容
简算下面各题(写出简算过程):
3.14×
+3.14×
18.7-3.375-6.625.
3.14×
| 1 |
| 5 |
| 4 |
| 5 |
18.7-3.375-6.625.
①3.14×
+3.14×
=3.14×(
+
)
=3.14×1
=3.14;
②18.7-3.375-6.625
=18.7-(3.375+6.625)
=18.7-10
=8.7.
| 1 |
| 5 |
| 4 |
| 5 |
=3.14×(
| 1 |
| 5 |
| 4 |
| 5 |
=3.14×1
=3.14;
②18.7-3.375-6.625
=18.7-(3.375+6.625)
=18.7-10
=8.7.
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