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