Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
492 + 88 =
2
580
|
2.
25 + 432 =
2
457
|
3.
788 – 47 =
741
2
|
4.
343 + 497 =
840
2
|
|
5.
914 + 21 =
2
935
|
6.
251 + 349 =
600
2
|
7.
547 – 269 =
278
2
|
8.
945 – 79 =
2
866
|
|
9.
502 – 425 =
2
77
|
10.
930 – 732 =
2
198
|
11.
313 – 140 =
173
2
|
12.
866 + 119 =
985
2
|
|
13.
600 + 368 =
968
2
|
14.
34 + 698 =
732
2
|
15.
689 – 136 =
2
553
|
16.
557 + 51 =
2
608
|
|
17.
940 + 32 =
2
972
|
18.
661 + 268 =
2
929
|
19.
255 + 77 =
2
332
|
20.
857 + 127 =
984
2
|