问题 解答题
计算.(写出解答过程,能应简便方法的要用简便方法)
(1)(0.125×8-0.5)×4(2)(
1
3
+
1
2
)÷
3
5
-
17
18
(3)907+907×9-900(4)9÷[
5
6
+(
5
8
-
1
3
)].
答案

(1)(0.125×8-0.5)×4,

=0.125×8×4-0.5×4,

=4-2,

=2;

(2)(

1
3
+
1
2
)÷
3
5
-
17
18

=

5
6
÷
3
5
-
17
18

=

25
18
-
17
18

=

4
9

(3)907+907×9-900,

=907×(1+9)-900,

=907×10-900,

=9070-900,

=8170;

(4)9÷[

5
6
+(
5
8
-
1
3
)],

=9÷[

5
6
+
7
24
],

=9÷

9
8

=8.

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