问题 解答题
直接写得数.
1-
2
5
+
3
5
=

3
2
×
2
3
=
0.5-
1
5
+0.5-
1
5
=
1+
1
4
=
1
4
+
1
3
)×24=
3
4
×7÷
3
4
=
8.1-0.9= 72÷0.4=1.25×8=
答案

(1)1-
2
5
+
3
5
=
6
5
(2)1÷
3
2
×
2
3
=
4
9
(3)0.5-
1
5
+0.5-
1
5
=
3
5
(4)1+
1
4
=1
1
4
(5)(
1
4
+
1
3
)×24=14
(6)7÷
3
4
×7÷
3
4
=
784
9
(7)8.1-0.9=7.2(8)72÷0.4=180(9)1.25×8=10

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