题目内容
计算:
(I) 6
+2+
-6.6+(
)
(II) (-
)×
÷(-
)
(III)-3-(-3)2÷
+(-1)20
(IV)(
-
)×12÷(-1)2007÷(
-
).
(I) 6
| 3 |
| 5 |
| 2 |
| 3 |
| 1 |
| 2 |
(II) (-
| 5 |
| 12 |
| 8 |
| 15 |
| 3 |
| 2 |
(III)-3-(-3)2÷
| 9 |
| 4 |
(IV)(
| 3 |
| 4 |
| 7 |
| 6 |
| 2 |
| 3 |
| 3 |
| 5 |
(I)原式=6.6-6.6+2+
+
=2+
+
=3
;
(II)原式=
×
×
=
;
(III)原式=-3-9×
+1
=-3-4+1
=-6;
(IV)原式=(
×12-
×12)÷(-1)÷(
-
)
=(9-14)÷(-1)×15
=5×15
=75.
| 2 |
| 3 |
| 1 |
| 2 |
=2+
| 4 |
| 6 |
| 3 |
| 6 |
=3
| 1 |
| 6 |
(II)原式=
| 5 |
| 12 |
| 8 |
| 15 |
| 2 |
| 3 |
=
| 4 |
| 27 |
(III)原式=-3-9×
| 4 |
| 9 |
=-3-4+1
=-6;
(IV)原式=(
| 3 |
| 4 |
| 7 |
| 6 |
| 10 |
| 15 |
| 9 |
| 15 |
=(9-14)÷(-1)×15
=5×15
=75.
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