题目内容
计算:-
=______.
| 3.6×2.1+3.5×2.4 |
| 10.5×7.2 |
原式=-(
+
)
=-(
+
)
=-
.
故答案为-
.
| 3.6×2.1 |
| 10.5×7.2 |
| 3.5×2.4 |
| 10.5×7.2 |
=-(
| 1 |
| 10 |
| 1 |
| 9 |
=-
| 19 |
| 90 |
故答案为-
| 19 |
| 90 |
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