题目内容
计算:
(1)12a4b3c2÷(-3a2bc2);(2)(
an+3-2an+1)÷(-
an-1);
(3)7.2×1012÷(-3.6×109);(4)(-
xy4)3÷(
xy4)2•y3.
(1)12a4b3c2÷(-3a2bc2);(2)(
| 3 |
| 2 |
| 1 |
| 3 |
(3)7.2×1012÷(-3.6×109);(4)(-
| 1 |
| 3 |
| 1 |
| 6 |
(1)原式=[12÷(-3)](a4÷a2)(b3÷b)(c2÷c2)=-4a2b2;
(2)原式=-
a4+6a2;
(3)原式=-2×103;
(4)原式=-
x3y12÷
x2y8•y3=-
xy4•y3=-
xy7.
(2)原式=-
| 9 |
| 2 |
(3)原式=-2×103;
(4)原式=-
| 1 |
| 27 |
| 1 |
| 36 |
| 4 |
| 3 |
| 4 |
| 3 |
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