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