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