Oefen erbijsommen en erafsommen tot 20
In de mix
1.
2
8
jimmy
+
=
2.
8
5
jimmy
–
=
3.
15
3
jimmy
+
=
4.
2
1
jimmy
+
=
5.
8
2
jimmy
–
=
6.
8
9
jimmy
+
=
7.
3
9
jimmy
+
=
8.
17
1
jimmy
+
=
9.
16
8
jimmy
–
=
10.
7
10
jimmy
+
=
11.
5
9
jimmy
+
=
12.
2
13
jimmy
+
=
13.
3
5
jimmy
+
=
14.
2
7
jimmy
+
=
15.
10
4
jimmy
–
=
16.
7
4
jimmy
+
=
17.
3
9
jimmy
+
=
18.
20
5
jimmy
–
=
19.
3
2
jimmy
+
=
20.
19
8
jimmy
–
=
21.
7
10
jimmy
+
=
22.
12
3
jimmy
–
=
23.
6
5
jimmy
–
=
24.
3
2
jimmy
–
=
Oefen erbijsommen en erafsommen tot 20
| ANTWOORDEN
In de mix
1.
2
8
10
+
=
2.
8
5
3
–
=
3.
15
3
18
+
=
4.
2
1
3
+
=
5.
8
2
6
–
=
6.
8
9
17
+
=
7.
3
9
12
+
=
8.
17
1
18
+
=
9.
16
8
8
–
=
10.
7
10
17
+
=
11.
5
9
14
+
=
12.
2
13
15
+
=
13.
3
5
8
+
=
14.
2
7
9
+
=
15.
10
4
6
–
=
16.
7
4
11
+
=
17.
3
9
12
+
=
18.
20
5
15
–
=
19.
3
2
5
+
=
20.
19
8
11
–
=
21.
7
10
17
+
=
22.
12
3
9
–
=
23.
6
5
1
–
=
24.
3
2
1
–
=