Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
849 – 379 =
470
2
|
2.
54 + 518 =
2
572
|
3.
423 + 299 =
2
722
|
4.
195 + 365 =
560
2
|
|
5.
325 + 138 =
463
2
|
6.
877 + 108 =
985
2
|
7.
743 – 266 =
477
2
|
8.
184 – 20 =
164
2
|
|
9.
125 – 10 =
2
115
|
10.
676 + 51 =
2
727
|
11.
762 – 75 =
687
2
|
12.
437 + 196 =
633
2
|
|
13.
507 + 431 =
2
938
|
14.
543 + 331 =
874
2
|
15.
332 + 39 =
2
371
|
16.
646 + 344 =
990
2
|
|
17.
634 – 93 =
2
541
|
18.
59 + 240 =
299
2
|
19.
742 – 577 =
2
165
|
20.
989 + 4 =
2
993
|