Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
373 + 158 =
531
2
|
2.
649 – 482 =
167
2
|
3.
356 – 132 =
2
224
|
4.
615 + 249 =
864
2
|
|
5.
239 – 203 =
36
2
|
6.
662 + 63 =
2
725
|
7.
357 + 420 =
2
777
|
8.
923 + 63 =
2
986
|
|
9.
533 – 130 =
2
403
|
10.
380 – 76 =
2
304
|
11.
435 – 55 =
2
380
|
12.
312 – 61 =
251
2
|
|
13.
50 – 5 =
45
2
|
14.
814 + 65 =
2
879
|
15.
535 – 260 =
2
275
|
16.
435 + 89 =
524
2
|
|
17.
815 + 130 =
2
945
|
18.
829 – 825 =
1
4
|
19.
81 + 417 =
2
498
|
20.
91 – 88 =
1
3
|