Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
170 + 314 =
484
2
|
2.
272 – 205 =
2
67
|
3.
667 – 117 =
2
550
|
4.
649 – 155 =
494
2
|
|
5.
571 + 351 =
922
2
|
6.
517 + 378 =
2
895
|
7.
77 + 521 =
598
2
|
8.
271 + 30 =
2
301
|
|
9.
274 – 54 =
2
220
|
10.
301 + 636 =
937
2
|
11.
429 – 289 =
140
2
|
12.
346 – 195 =
2
151
|
|
13.
818 – 586 =
232
2
|
14.
623 – 491 =
132
2
|
15.
729 + 188 =
2
917
|
16.
921 – 564 =
357
2
|
|
17.
301 – 46 =
255
2
|
18.
370 + 494 =
864
2
|
19.
87 – 32 =
55
2
|
20.
810 – 244 =
566
2
|