题目内容
计算:
(1)(-12)-5+(-14)-(-39)
(2)(
-
+
)×48
(3)(-18)÷2
×
÷(-16)
(4)-63×(-
)2-72
(1)(-12)-5+(-14)-(-39)
(2)(
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 24 |
(3)(-18)÷2
| 1 |
| 4 |
| 4 |
| 9 |
(4)-63×(-
| 1 |
| 6 |
(1)原式=-12-5-14+39=-31+39=8;
(2)原式=
×48-
×48+
×48=32-18+10=24;
(3)原式=-18×
×
×(-
)=
;
(4)原式=-63×
-49=-6-49=-55.
(2)原式=
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 24 |
(3)原式=-18×
| 4 |
| 9 |
| 4 |
| 9 |
| 1 |
| 16 |
| 1 |
| 18 |
(4)原式=-63×
| 1 |
| 62 |
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