题目内容
计算:
(1)(-7)×(-5)-90÷(-15)
(2)-23÷
×(-
)2.
(1)(-7)×(-5)-90÷(-15)
(2)-23÷
| 4 |
| 9 |
| 2 |
| 3 |
(1)(-7)×(-5)-90÷(-15)
=35+6
=41;
(2)-23÷
×(-
)2
=-8÷
×
=-8×
×
=-8.
=35+6
=41;
(2)-23÷
| 4 |
| 9 |
| 2 |
| 3 |
=-8÷
| 4 |
| 9 |
| 4 |
| 9 |
=-8×
| 9 |
| 4 |
| 4 |
| 9 |
=-8.
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