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