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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