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