题目内容
计算:
(1)-72+72÷36
(2)3
×(
-
)×
÷
(3)(-1)3-(1-
)÷3×[2-(-3)2]
(4)-92+2×(-3)2-(-6)÷(-
)
(5)-2×(-
)2+|-(-2)|3-(-
)
(6)(
-1)×(
-1)×(
-1)×…×(
-1)×(
-1)×(
-1).
(1)-72+72÷36
(2)3
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 11 |
| 5 |
| 4 |
(3)(-1)3-(1-
| 1 |
| 2 |
(4)-92+2×(-3)2-(-6)÷(-
| 4 |
| 3 |
(5)-2×(-
| 1 |
| 2 |
| 1 |
| 2 |
(6)(
| 1 |
| 50 |
| 1 |
| 49 |
| 1 |
| 48 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
(1)-72+72÷36
=-72+2
=-70;
(2)3
×(
-
)×
÷
=
×(-
)×
×
=
;
(3)(-1)3-(1-
)÷3×[2-(-3)2]
=-1-
×
×[2-9]
=-1-
×[-7]
=-1+
=
;
(4)-92+2×(-3)2-(-6)÷(-
)
=-81+2×9-4.5
=-81+18-4.5
=-67.5;
(5)-2×(-
)2+|-(-2)|3-(-
)
=-2×
+8+
=-
+8+
=8;
(6)(
-1)×(
-1)×(
-1)×…×(
-1)×(
-1)×(
-1)
=-
×
×…×
×
=-
.
=-72+2
=-70;
(2)3
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 11 |
| 5 |
| 4 |
=
| 11 |
| 3 |
| 1 |
| 6 |
| 3 |
| 11 |
| 4 |
| 5 |
=
| 2 |
| 15 |
(3)(-1)3-(1-
| 1 |
| 2 |
=-1-
| 1 |
| 2 |
| 1 |
| 3 |
=-1-
| 1 |
| 6 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
(4)-92+2×(-3)2-(-6)÷(-
| 4 |
| 3 |
=-81+2×9-4.5
=-81+18-4.5
=-67.5;
(5)-2×(-
| 1 |
| 2 |
| 1 |
| 2 |
=-2×
| 1 |
| 4 |
| 1 |
| 2 |
=-
| 1 |
| 2 |
| 1 |
| 2 |
=8;
(6)(
| 1 |
| 50 |
| 1 |
| 49 |
| 1 |
| 48 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
=-
| 49 |
| 50 |
| 48 |
| 49 |
| 2 |
| 3 |
| 1 |
| 2 |
=-
| 1 |
| 50 |
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