题目内容
计算:
(1)4-(-4)+(-3);
(2)-7
+5+2
;
(3)-14-[3-(-2)3];
(4)(-
)×3÷(-3)×(-
);
(5)-2×(-2
)+(-7)×2
+5×
;
(6)4
×[-32×(-
)2-0.8]÷(-2
).
(1)4-(-4)+(-3);
(2)-7
| 1 |
| 3 |
| 1 |
| 3 |
(3)-14-[3-(-2)3];
(4)(-
| 1 |
| 3 |
| 1 |
| 3 |
(5)-2×(-2
| 1 |
| 6 |
| 1 |
| 6 |
| 13 |
| 6 |
(6)4
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
(1)4-(-4)+(-3)
=4+4-3
=5;
(2)-7
+5+2
=-7
+2
+5
=-5+5
=0;
(3)-14-[3-(-2)3]
=-1-[3+8]
=-1-11
=-12;
(4)(-
)×3÷(-3)×(-
)
=-(
×
)×(3÷3)
=-
×1
=-
;
(5)-2×(-2
)+(-7)×2
+5×
=(2-7+5)×2
=0×2
=0;
(6)4
×[-32×(-
)2-0.8]÷(-2
)
=4
×[-9×
-0.8]×(-
)
=4
×[-1-0.8]×(-
)
=
×(-
)×(-
)
=
.
=4+4-3
=5;
(2)-7
| 1 |
| 3 |
| 1 |
| 3 |
=-7
| 1 |
| 3 |
| 1 |
| 3 |
=-5+5
=0;
(3)-14-[3-(-2)3]
=-1-[3+8]
=-1-11
=-12;
(4)(-
| 1 |
| 3 |
| 1 |
| 3 |
=-(
| 1 |
| 3 |
| 1 |
| 3 |
=-
| 1 |
| 9 |
=-
| 1 |
| 9 |
(5)-2×(-2
| 1 |
| 6 |
| 1 |
| 6 |
| 13 |
| 6 |
=(2-7+5)×2
| 1 |
| 6 |
=0×2
| 1 |
| 6 |
=0;
(6)4
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
=4
| 1 |
| 2 |
| 1 |
| 9 |
| 4 |
| 9 |
=4
| 1 |
| 2 |
| 4 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 5 |
| 4 |
| 9 |
=
| 18 |
| 5 |
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