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