问题 解答题
计算下列各题:
(1)3×(-2)-(-1)÷
1
3
×(-3)

(2)-7×(-
22
7
)
+26×(-
22
7
)
+2×
22
7

(3)-13-(1-0.5)×
1
3
×[2-(-3)2]

(4)(-2)2-(3-5)-
4
+2×(-3)
答案

(1)原式=-6+1×3×(-3)

=-6-9

=-15;

(2)原式=-

22
7
×(-7+26-2)

=-

22
7
×(-21)

=-66;

(3)原式=-1-

1
2
×
1
3
×(2-9)

=-1+

7
6

=

1
6

(4)原式=4-(-2)-2-6

=-2.

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