Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
669 + 281 =
2
950
|
2.
703 + 209 =
2
912
|
3.
990 + 9 =
2
999
|
4.
545 – 457 =
2
88
|
|
5.
991 + 4 =
2
995
|
6.
131 – 21 =
110
2
|
7.
995 + 3 =
2
998
|
8.
982 – 727 =
2
255
|
|
9.
774 – 104 =
670
2
|
10.
197 + 578 =
775
2
|
11.
110 – 55 =
2
55
|
12.
904 – 479 =
425
2
|
|
13.
366 + 519 =
885
2
|
14.
578 + 236 =
814
2
|
15.
635 – 311 =
2
324
|
16.
498 – 43 =
2
455
|
|
17.
765 – 607 =
158
2
|
18.
927 + 67 =
994
2
|
19.
88 + 706 =
2
794
|
20.
221 – 156 =
2
65
|