题目内容
计算
(1)-20-(+14)+(-18)-(-13)
(2)-2
-(-
)+3
+(-2
)
(3)(-81)÷2
×(-
)÷4
(4)(-7)×(-5)-90÷(-15)
(5)(-36)×(
-
+
)
(6)-42÷(-
)÷(-1)7+(1
+1
-
)×24.
(1)-20-(+14)+(-18)-(-13)
(2)-2
| 3 |
| 4 |
| 1 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
(3)(-81)÷2
| 1 |
| 4 |
| 1 |
| 9 |
(4)(-7)×(-5)-90÷(-15)
(5)(-36)×(
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 9 |
(6)-42÷(-
| 1 |
| 2 |
| 1 |
| 8 |
| 1 |
| 3 |
| 3 |
| 4 |
(1)原式=-20-14-18+13
=-38-1
=-39;
(2)原式=-2
-2
+
+3
=-5+3
=-1
;
(3)原式=-81×
×(-
)×
=1;
(4)原式=35+6
=41;
(5)原式=-36×
-36×(-
)-36×
=-27+30-28
=-25;
(6)原式=-16×(-2)×(-1)+24+
×24+24+
×24-
×24
=-32+24+3+24+8-18
=-40+51
=9.
=-38-1
=-39;
(2)原式=-2
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 8 |
| 3 |
| 8 |
=-5+3
| 1 |
| 2 |
=-1
| 1 |
| 2 |
(3)原式=-81×
| 4 |
| 9 |
| 1 |
| 9 |
| 1 |
| 4 |
=1;
(4)原式=35+6
=41;
(5)原式=-36×
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 9 |
=-27+30-28
=-25;
(6)原式=-16×(-2)×(-1)+24+
| 1 |
| 8 |
| 1 |
| 3 |
| 3 |
| 4 |
=-32+24+3+24+8-18
=-40+51
=9.
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