题目内容
计算:
(1)-5+6÷(-
)2×(-1)12;
(2)-3(2a-5)+6a.
(1)-5+6÷(-
| 1 |
| 3 |
(2)-3(2a-5)+6a.
(1)原式=-5+6÷
×1
=-5+6×9
=-5+54
=49;
(2)原式=-6a+15+6a
=15.
| 1 |
| 9 |
=-5+6×9
=-5+54
=49;
(2)原式=-6a+15+6a
=15.
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