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