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