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