Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
293 + 631 =
924
2
|
2.
570 – 229 =
341
2
|
3.
450 – 330 =
2
120
|
4.
328 – 110 =
2
218
|
|
5.
587 – 143 =
444
2
|
6.
450 – 145 =
2
305
|
7.
819 – 235 =
2
584
|
8.
152 – 140 =
1
12
|
|
9.
124 + 561 =
2
685
|
10.
578 – 406 =
172
2
|
11.
903 + 74 =
977
2
|
12.
274 + 191 =
2
465
|
|
13.
598 – 55 =
543
2
|
14.
101 + 189 =
290
2
|
15.
528 + 432 =
2
960
|
16.
562 + 316 =
878
2
|
|
17.
309 – 292 =
2
17
|
18.
627 + 155 =
782
2
|
19.
82 + 620 =
702
2
|
20.
323 – 317 =
6
1
|