Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
509 + 415 =
924
2
|
2.
645 – 284 =
2
361
|
3.
388 – 61 =
2
327
|
4.
107 – 43 =
64
2
|
|
5.
206 + 286 =
2
492
|
6.
177 – 111 =
2
66
|
7.
760 + 236 =
2
996
|
8.
760 + 143 =
2
903
|
|
9.
657 + 311 =
2
968
|
10.
766 + 172 =
938
2
|
11.
527 + 330 =
857
2
|
12.
442 + 372 =
814
2
|
|
13.
62 + 433 =
2
495
|
14.
233 + 348 =
581
2
|
15.
696 – 499 =
197
2
|
16.
98 – 55 =
2
43
|
|
17.
896 + 101 =
997
2
|
18.
490 + 66 =
2
556
|
19.
772 + 215 =
2
987
|
20.
706 + 261 =
967
2
|