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