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