计算.78-68=47-37=28+58=19+89=88-1=89-510=35+25=23-23=113-13=-三年级数学

题文

计算.
7
8
-
6
8
=
4
7
-
3
7
=
2
8
+
5
8
=
1
9
+
8
9
=
8
8
-1=
8
9
-
5
10
=
3
5
+
2
5
=
2
3
-
2
3
=
1
1
3
-
1
3
=
题型:解答题  难度:中档

答案

7
8
-
6
8
=
1
8
4
7
-
3
7
=
1
7
2
8
+
5
8
=
7
8
1
9
+
8
9