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