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