题目内容


7.08÷(1.25×0.8)=
5
9
-
5
6
+
4
9
=
3
5
×
2
5
÷
3
5
×
2
5
=
5.38-(2.1+2.38)=
1
7
-
1
9
)×63=
0.5×(2.6-2.4)=(0.18+0.9)÷0.9=3-
8
15
-
7
15
=
(1)7.08÷(1.25×0.8),
=7.08÷1,
=7.08;

(2)
5
9
-
5
6
+
4
9

=
5
9
+
4
9
-
5
6

=1-
5
6

=
1
6


(3)
3
5
×
2
5
÷
3
5
×
2
5

=
3
5
×
2
5
×
5
3
×
2
5

=(
3
5
×
5
3
)×(
2
5
×
2
5
),
=1×
4
25

=
4
25


(4)5.38-(2.1+2.38),
=5.38-2.38-2.1,
=3-2.1,
=0.9;

(5)(
1
7
-
1
9
)×63,
=
1
7
×63-
1
9
×63,
=9-7,
=2;

(6)0.5×(2.6-2.4),
=0.5×0.2,
=0.1;

(7)(0.18+0.9)÷0.9,
=1.08÷0.9,
=1.2;

(8)3-
8
15
-
7
15

=3-(
8
15
+
7
15
),
=3-1,
=2.
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