Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
274 + 448 =
722
2
|
2.
41 + 428 =
2
469
|
3.
917 – 828 =
2
89
|
4.
339 + 55 =
394
2
|
|
5.
993 + 5 =
2
998
|
6.
662 – 131 =
531
2
|
7.
813 – 274 =
539
2
|
8.
680 – 91 =
589
2
|
|
9.
681 – 237 =
2
444
|
10.
915 + 80 =
995
2
|
11.
195 + 237 =
432
2
|
12.
821 + 53 =
2
874
|
|
13.
68 – 21 =
47
2
|
14.
727 + 234 =
961
2
|
15.
879 + 114 =
2
993
|
16.
531 + 291 =
822
2
|
|
17.
829 + 12 =
841
2
|
18.
964 + 20 =
984
2
|
19.
44 – 41 =
1
3
|
20.
795 + 172 =
967
2
|