问题 解答题
计算题:
(1)(+7)+(-8)-(+3)-(-4);
(2)-1
1
3
-2
1
3
÷(-
3
2
)×(-3);
(3)-36×(
1
9
-
1
6
-
1
18
);
(4)-13-(1-0.5)×
1
3
×[2-(-3)2];
(5)(-0.25)×1.25×(-4)×(-8);
(6)(-1)10×2+(-2)3÷4.
答案

(1)(+7)+(-8)-(+3)-(-4)

=7-8-3+4

=11-11

=0;

(2)-1

1
3
-2
1
3
÷(-
3
2
)×(-3)

=-1

1
3
-
7
3
×(-
2
3
)×(-3)

=-1

1
3
-4
2
3

=-6;

(3)-36×(

1
9
-
1
6
-
1
18

=(-36)×

1
9
+(-36)×(-
1
6
)+(-36)×(-
1
18

=-4+6+2

=-4+8

=4;

(4)-13-(1-0.5)×

1
3
×[2-(-3)2]

=-1-

1
2
×
1
3
×(2-9)

=-1+

7
6

=

1
6

(5)(-0.25)×1.25×(-4)×(-8)

=(-0.25)×(-4)×[1.25×(-8)]

=1×(-10)

=-10;

(6)(-1)10×2+(-2)3÷4

=1×2+(-8)÷4

=2-2

=0.

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