题目内容
计算:
(1)-4
-5
+7
(2)8×(-1)2-(-4)+(-3)
(3)(-2)3÷|-32+1|-(-5
)×
(4)5(x-3y)-(-2y+x)
(1)-4
1 |
3 |
1 |
2 |
1 |
3 |
(2)8×(-1)2-(-4)+(-3)
(3)(-2)3÷|-32+1|-(-5
1 |
2 |
4 |
11 |
(4)5(x-3y)-(-2y+x)
(1)原式=(-4
+7
)-5
=3-5
=-2
;
(2)原式=8+4-3
=9;
(3)原式=-8÷8+
×
=-1+2
=1;
(4)原式=5x-15y+2y-x
=4x-13y.
1 |
3 |
1 |
3 |
1 |
2 |
=3-5
1 |
2 |
=-2
1 |
2 |
(2)原式=8+4-3
=9;
(3)原式=-8÷8+
11 |
2 |
4 |
11 |
=-1+2
=1;
(4)原式=5x-15y+2y-x
=4x-13y.
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