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