题目内容
0.7×1
+2
×(-15)+0.7×
+
×(-15)=______.
| 4 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
| 1 |
| 4 |
原式=0.7×(1
+
)+(-15)×(2
+
)=0.7×2-15×3=-43.6.
故答案为:-43.6.
| 4 |
| 9 |
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 4 |
故答案为:-43.6.
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