Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
909 – 376 =
2
533
|
2.
129 – 47 =
2
82
|
3.
153 + 93 =
2
246
|
4.
891 + 102 =
993
2
|
|
5.
862 – 779 =
2
83
|
6.
854 – 840 =
14
1
|
7.
680 + 288 =
2
968
|
8.
801 + 128 =
929
2
|
|
9.
377 – 105 =
2
272
|
10.
91 + 379 =
2
470
|
11.
490 – 93 =
397
2
|
12.
483 – 177 =
2
306
|
|
13.
664 – 98 =
2
566
|
14.
662 + 55 =
717
2
|
15.
865 + 31 =
896
2
|
16.
492 – 337 =
2
155
|
|
17.
425 – 370 =
55
2
|
18.
481 + 467 =
948
2
|
19.
538 – 220 =
2
318
|
20.
257 + 561 =
2
818
|