问题 解答题
脱式计算
320×50-24111÷57
86420-11928÷28×60
3.8-1.395÷0.31×0.50.15×(6.52-1.83)÷70
(
11
18
-
2
9
)÷(
3
8
+
3
20
)
3-(
6
7
-
1
4
)
答案

(1)320×50-24111÷57,

=16000-423,

=15577;

(2)86420-11928÷28×60,

=86420-426×60,

=86420-25560,

=60860;

(3)3.8-1.395÷0.31×0.5,

=3.8-4.5×0.5,

=3.8-2.25,

=1.55;

(4)0.15×(6.52-1.83)÷70,

=0.15×4.42÷70,

=0.663÷70,

=

663
7000

(5)(

11
18
-
2
9
)÷(
3
8
+
3
20
),

=

7
18
÷
21
40

=

20
27

(6)8÷3-(

6
7
-
1
4
),

=8÷3-

17
28

=

8
3
-
17
28

=

173
84

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