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