Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
623 – 214 =
2
409
|
2.
834 + 66 =
2
900
|
3.
345 – 266 =
2
79
|
4.
474 – 470 =
1
4
|
|
5.
608 + 224 =
832
2
|
6.
480 + 75 =
2
555
|
7.
658 + 181 =
2
839
|
8.
191 + 23 =
214
2
|
|
9.
395 + 513 =
2
908
|
10.
274 + 250 =
524
2
|
11.
891 + 15 =
2
906
|
12.
378 + 315 =
2
693
|
|
13.
613 + 208 =
2
821
|
14.
825 – 334 =
491
2
|
15.
371 – 222 =
2
149
|
16.
570 – 473 =
2
97
|
|
17.
671 – 64 =
2
607
|
18.
234 – 146 =
2
88
|
19.
481 + 403 =
884
2
|
20.
707 + 6 =
2
713
|