Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
439 – 414 =
25
2
|
2.
929 – 824 =
2
105
|
3.
975 + 11 =
986
2
|
4.
151 – 90 =
2
61
|
|
5.
150 – 19 =
2
131
|
6.
168 – 26 =
142
2
|
7.
104 + 408 =
512
2
|
8.
253 – 160 =
93
2
|
|
9.
474 – 37 =
2
437
|
10.
618 + 240 =
858
2
|
11.
312 – 144 =
2
168
|
12.
524 – 184 =
340
2
|
|
13.
218 – 127 =
91
2
|
14.
876 + 33 =
909
2
|
15.
677 – 436 =
241
2
|
16.
876 + 47 =
2
923
|
|
17.
3 + 655 =
658
2
|
18.
149 – 138 =
11
1
|
19.
9 – 4 =
5
1
|
20.
49 – 3 =
46
2
|