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