Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
621 – 359 =
262
2
|
2.
145 – 116 =
2
29
|
3.
682 + 150 =
832
2
|
4.
645 + 31 =
676
2
|
|
5.
385 + 121 =
2
506
|
6.
664 – 129 =
2
535
|
7.
286 + 203 =
2
489
|
8.
637 + 96 =
733
2
|
|
9.
851 + 19 =
870
2
|
10.
469 + 434 =
903
2
|
11.
62 + 200 =
2
262
|
12.
674 + 171 =
845
2
|
|
13.
467 – 9 =
458
2
|
14.
967 + 22 =
2
989
|
15.
305 – 290 =
15
1
|
16.
795 – 300 =
2
495
|
|
17.
324 + 411 =
735
2
|
18.
45 – 18 =
27
2
|
19.
678 + 7 =
2
685
|
20.
484 + 12 =
496
2
|