题目内容

①625×80-2520÷24②(6+10.88÷3.2)×1.5
1
9
×
10
13
+
8
13
÷9
④[(
6
5
-
1
2
)÷14]×
4
3
①625×80-2520÷24,
=50000-105,
=49895;

②(6+10.88÷3.2)×1.5,
=(6+3.4)×1.5,
=9.4×1.5,
=14.1;

1
9
×
10
13
+
8
13
÷
9,
=
1
9
×
10
13
+
8
13
×
1
9

=(
10
13
+
8
13
)×
1
9

=
18
13
×
1
9

=
2
13


④[(
6
5
-
1
2
)÷14]×
4
3

=[(
12
10
-
5
10
)×
1
14
4
3

=[
7
10
×
1
14
4
3

=
1
20
×
4
3

=
1
15
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