题目内容
计算:
(1)3
+(-
)-(-
)+2
(2)(-5)×6+(-125)÷(-5)
(3)-82+3×(-2)2+(-6)÷(-
)2
(4)-2×(-
)2+|-(-2)|3-(-
).
(1)3
1 |
2 |
1 |
2 |
1 |
3 |
2 |
3 |
(2)(-5)×6+(-125)÷(-5)
(3)-82+3×(-2)2+(-6)÷(-
1 |
3 |
(4)-2×(-
1 |
2 |
1 |
2 |
(1)3
+(-
)-(-
)+2
=3
-
+
+2
=3+3
=6;
(2)(-5)×6+(-125)÷(-5)
=-30+25
=-5;
(3)-82+3×(-2)2+(-6)÷(-
)2
=-64+3×4+(-6)×9
=-64+12-54
=-106;
(4)-2×(-
)2+|-(-2)|3-(-
).
=-2×
+8+
=-
+8+
=8.
1 |
2 |
1 |
2 |
1 |
3 |
2 |
3 |
=3
1 |
2 |
1 |
2 |
1 |
3 |
2 |
3 |
=3+3
=6;
(2)(-5)×6+(-125)÷(-5)
=-30+25
=-5;
(3)-82+3×(-2)2+(-6)÷(-
1 |
3 |
=-64+3×4+(-6)×9
=-64+12-54
=-106;
(4)-2×(-
1 |
2 |
1 |
2 |
=-2×
1 |
4 |
1 |
2 |
=-
1 |
2 |
1 |
2 |
=8.
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