Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
141 – 73 =
68
2
|
2.
913 – 230 =
683
2
|
3.
184 + 173 =
2
357
|
4.
235 – 175 =
2
60
|
|
5.
878 – 623 =
255
2
|
6.
713 – 67 =
2
646
|
7.
872 – 392 =
480
2
|
8.
473 + 6 =
479
2
|
|
9.
108 + 452 =
560
2
|
10.
839 + 4 =
843
2
|
11.
381 – 143 =
238
2
|
12.
119 – 6 =
113
2
|
|
13.
555 + 422 =
977
2
|
14.
118 – 75 =
43
2
|
15.
729 + 96 =
825
2
|
16.
889 – 618 =
271
2
|
|
17.
67 + 846 =
913
2
|
18.
861 + 135 =
996
2
|
19.
409 + 43 =
2
452
|
20.
936 + 28 =
2
964
|