Oefen erbijsommen en erafsommen tot 20
In de mix
1.
18
1
jimmy
+
=
2.
2
0
jimmy
+
=
3.
8
11
jimmy
+
=
4.
10
1
jimmy
+
=
5.
2
4
jimmy
+
=
6.
8
3
jimmy
–
=
7.
8
5
jimmy
–
=
8.
13
6
jimmy
+
=
9.
4
3
jimmy
–
=
10.
13
5
jimmy
+
=
11.
9
4
jimmy
–
=
12.
11
8
jimmy
–
=
13.
16
5
jimmy
–
=
14.
3
2
jimmy
–
=
15.
8
1
jimmy
+
=
16.
11
3
jimmy
+
=
17.
18
2
jimmy
+
=
18.
2
13
jimmy
+
=
19.
7
13
jimmy
+
=
20.
11
5
jimmy
–
=
21.
2
0
jimmy
+
=
22.
7
2
jimmy
+
=
23.
8
6
jimmy
–
=
24.
17
7
jimmy
–
=
Oefen erbijsommen en erafsommen tot 20
| ANTWOORDEN
In de mix
1.
18
1
19
+
=
2.
2
0
2
+
=
3.
8
11
19
+
=
4.
10
1
11
+
=
5.
2
4
6
+
=
6.
8
3
5
–
=
7.
8
5
3
–
=
8.
13
6
19
+
=
9.
4
3
1
–
=
10.
13
5
18
+
=
11.
9
4
5
–
=
12.
11
8
3
–
=
13.
16
5
11
–
=
14.
3
2
1
–
=
15.
8
1
9
+
=
16.
11
3
14
+
=
17.
18
2
20
+
=
18.
2
13
15
+
=
19.
7
13
20
+
=
20.
11
5
6
–
=
21.
2
0
2
+
=
22.
7
2
9
+
=
23.
8
6
2
–
=
24.
17
7
10
–
=