Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
957 – 554 =
2
403
|
2.
525 + 327 =
2
852
|
3.
752 + 124 =
2
876
|
4.
329 + 521 =
2
850
|
|
5.
715 – 13 =
702
2
|
6.
48 + 412 =
460
2
|
7.
637 – 320 =
2
317
|
8.
175 + 164 =
2
339
|
|
9.
950 – 788 =
162
2
|
10.
987 + 12 =
999
2
|
11.
389 + 405 =
794
2
|
12.
150 + 618 =
2
768
|
|
13.
67 – 29 =
38
2
|
14.
111 + 661 =
2
772
|
15.
978 + 7 =
985
2
|
16.
14 + 128 =
2
142
|
|
17.
117 + 668 =
785
2
|
18.
817 – 675 =
2
142
|
19.
822 + 107 =
929
2
|
20.
738 + 76 =
814
2
|