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