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