Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
969 – 91 =
878
2
|
2.
332 – 197 =
2
135
|
3.
475 + 305 =
780
2
|
4.
359 + 338 =
697
2
|
|
5.
884 – 334 =
2
550
|
6.
701 + 203 =
2
904
|
7.
845 – 434 =
2
411
|
8.
380 + 538 =
918
2
|
|
9.
909 – 254 =
2
655
|
10.
778 – 541 =
237
2
|
11.
747 – 415 =
332
2
|
12.
956 + 27 =
983
2
|
|
13.
788 + 124 =
912
2
|
14.
956 + 16 =
972
2
|
15.
754 + 183 =
2
937
|
16.
379 + 410 =
2
789
|
|
17.
553 + 248 =
801
2
|
18.
75 + 124 =
2
199
|
19.
889 – 118 =
2
771
|
20.
6 + 604 =
2
610
|