问题 解答题
用你喜欢的方法脱式计算.
(1)128+750÷25×18
(2)(800×
4
5
-360)÷40
(3)
13
8
×
3
7
+
3
8
×
3
7

(4)[1-(
1
2
-
1
4
)]×
2
3
答案

(1)128+750÷25×18

=128+30×18,

=128+540,

=668;

(2)(800×

4
5
-360)÷40

=(640-360)÷40,

=280÷40,

=7;

(3)

13
8
×
3
7
+
3
8
×
3
7

=(

13
8
+
3
8
)×
3
7

=2×

3
7

=

6
7

(4)[1-(

1
2
-
1
4
)]×
2
3

=[1-

1
4
2
3

=

3
4
×
2
3

=

1
2

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