题目内容
用你认为最简便的方法计算(每小题3分,共12分)
(1)(-8)+(-11)-13-(-12);
(2)-36×(
-
-
)÷(-2);
(3)-22÷
×(1-
)2;
(4)
-
+(-2)2.
(1)(-8)+(-11)-13-(-12);
(2)-36×(
1 |
4 |
1 |
9 |
1 |
12 |
(3)-22÷
2 |
3 |
1 |
3 |
(4)
|
3 | 64 |
(1)原式=-8-11-(13-12)=-8-11-1=-20;
(2)原式=(9-4-3)÷2=2÷2=1;
(3)原式=-4×
×
=-
;
(4)原式=
-4+4=
-(4-4)=
.
(2)原式=(9-4-3)÷2=2÷2=1;
(3)原式=-4×
3 |
2 |
4 |
9 |
8 |
3 |
(4)原式=
1 |
3 |
1 |
3 |
1 |
3 |
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