题目内容
计算
(1)22-(-4)+(-2)+4;
(2)(-0.6)+1.7+(+0.6 )+(-1.7 )+(-9 );
(3)(-5)×
×(-
)×
×0;
(4)(-12.5)×(-2.5)×(-4)×(-8).
(5)[1
-(
+
-
)×24]÷(-5)
(6)-81÷
-
÷(-
).
(1)22-(-4)+(-2)+4;
(2)(-0.6)+1.7+(+0.6 )+(-1.7 )+(-9 );
(3)(-5)×
| 5 |
| 6 |
| 9 |
| 5 |
| 1 |
| 4 |
(4)(-12.5)×(-2.5)×(-4)×(-8).
(5)[1
| 1 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
(6)-81÷
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
(1)原式=22+4-2+4
=28;
(2)原式=[(-0.6)+(0.6)]+[1.7+(-1.7)]+(-9)
=-9;
(3)原式=0;
(4)原式[(-12.5)×(-8)]×[(-2.5)×(-4)]
=100×10
=1000;
(5)原式=(
-9-4+18)×(-
)
=-
-1
=-1
;
(6)原式=-81×3-
×(-9)
=-81×3+3
=3×(-80)
=-240.
=28;
(2)原式=[(-0.6)+(0.6)]+[1.7+(-1.7)]+(-9)
=-9;
(3)原式=0;
(4)原式[(-12.5)×(-8)]×[(-2.5)×(-4)]
=100×10
=1000;
(5)原式=(
| 25 |
| 24 |
| 1 |
| 5 |
=-
| 5 |
| 24 |
=-1
| 5 |
| 24 |
(6)原式=-81×3-
| 1 |
| 3 |
=-81×3+3
=3×(-80)
=-240.
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