题目内容

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
)
(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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