Oefen erbijsommen en erafsommen tot 20
In de mix
1.
6
2
jimmy
–
=
2.
12
8
jimmy
+
=
3.
6
11
jimmy
+
=
4.
3
3
jimmy
+
=
5.
10
3
jimmy
+
=
6.
7
13
jimmy
+
=
7.
3
1
jimmy
+
=
8.
16
14
jimmy
–
=
9.
10
7
jimmy
+
=
10.
18
11
jimmy
–
=
11.
12
10
jimmy
–
=
12.
20
17
jimmy
–
=
13.
17
16
jimmy
–
=
14.
3
2
jimmy
–
=
15.
2
0
jimmy
+
=
16.
14
6
jimmy
+
=
17.
10
3
jimmy
–
=
18.
3
13
jimmy
+
=
19.
6
12
jimmy
+
=
20.
4
2
jimmy
–
=
21.
15
11
jimmy
–
=
22.
10
4
jimmy
–
=
23.
9
8
jimmy
+
=
24.
19
6
jimmy
–
=
Oefen erbijsommen en erafsommen tot 20
| ANTWOORDEN
In de mix
1.
6
2
4
–
=
2.
12
8
20
+
=
3.
6
11
17
+
=
4.
3
3
6
+
=
5.
10
3
13
+
=
6.
7
13
20
+
=
7.
3
1
4
+
=
8.
16
14
2
–
=
9.
10
7
17
+
=
10.
18
11
7
–
=
11.
12
10
2
–
=
12.
20
17
3
–
=
13.
17
16
1
–
=
14.
3
2
1
–
=
15.
2
0
2
+
=
16.
14
6
20
+
=
17.
10
3
7
–
=
18.
3
13
16
+
=
19.
6
12
18
+
=
20.
4
2
2
–
=
21.
15
11
4
–
=
22.
10
4
6
–
=
23.
9
8
17
+
=
24.
19
6
13
–
=