问题 解答题
直接写出得数
100-52=
1.75+1.5=
1
2
+
1
3
=
3
5
-
1
2
=
8×25=
4.2÷0.6=
7
8
-
3
7
+
1
8
=
1
2
-
1
2
×
1
5
=
12-
4
9
-
5
9
=
51×98≈
答案

100-52=48,

1.75+1.5=3.25,

1
2
+
1
3
=
5
6

3
5
-
1
2
=
1
10

8×25=200,

4.2÷0.6=7,

7
8
-
3
7
+
1
8
=
4
7

1
2
-
1
2
×
1
5
=
2
5

12-

4
9
-
5
9
=11,

51×98≈5000.

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