题目内容
计算:
(1)9+(-1.4)-(+6)-(-1
);
(2)(-12)×(
+
-1);
(3)(-
)×5+(-5)×(-
)+5×(-
);
(4)5+36÷(-3)2×(-
)-(-1)2013.
(1)9+(-1.4)-(+6)-(-1
| 2 |
| 5 |
(2)(-12)×(
| 3 |
| 4 |
| 5 |
| 6 |
(3)(-
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
(4)5+36÷(-3)2×(-
| 1 |
| 2 |
(1)原式=9-1.4-6+1
=9-6+1
-1.4
=3;
(2)原式=(-12)×
+(-12)×
-(-12)×1
=-9-10+12
=-19+12
=-7;
(3)原式=(-5)×(
-
+
)
=(-5)×1
=-5;
(4)原式=5+36÷9×(-
)-(-1)
=5+4×(-
)+1
=5-2+1
=4.
| 2 |
| 5 |
=9-6+1
| 2 |
| 5 |
=3;
(2)原式=(-12)×
| 3 |
| 4 |
| 5 |
| 6 |
=-9-10+12
=-19+12
=-7;
(3)原式=(-5)×(
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
=(-5)×1
=-5;
(4)原式=5+36÷9×(-
| 1 |
| 2 |
=5+4×(-
| 1 |
| 2 |
=5-2+1
=4.
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