题目内容
计算下列各式
(1)-1+(-2)-(-3)-5
(2)(-5)×6+(-125)÷(-5)
(3)-3.5÷
×(-
)
(4)|-2
|-(-2.5)+1-|1-2
|
(5)-7×(-3
)+(-6)×(-3
)-(-13)×(-3
)
(6)-12012-(2-0.5)×
÷[-2-(-3)2].
(1)-1+(-2)-(-3)-5
(2)(-5)×6+(-125)÷(-5)
(3)-3.5÷
| 7 |
| 8 |
| 8 |
| 7 |
(4)|-2
| 1 |
| 2 |
| 1 |
| 2 |
(5)-7×(-3
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
(6)-12012-(2-0.5)×
| 22 |
| 3 |
(1)原式=-1-2+3-5=-5;
(2)原式=-30+25=-5;
(3)原式=
×
×
=
;
(4)原式=2.5+2.5+1-1.5=4.5;
(5)原式=(-7-6+13)×(-
)=0;
(6)原式=-1-
×
÷(-11)=-1+
=-
.
(2)原式=-30+25=-5;
(3)原式=
| 7 |
| 2 |
| 8 |
| 7 |
| 8 |
| 7 |
| 32 |
| 7 |
(4)原式=2.5+2.5+1-1.5=4.5;
(5)原式=(-7-6+13)×(-
| 27 |
| 7 |
(6)原式=-1-
| 3 |
| 2 |
| 4 |
| 3 |
| 2 |
| 11 |
| 9 |
| 11 |
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