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