Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
798 – 622 =
176
2
|
2.
943 + 43 =
2
986
|
3.
170 + 657 =
2
827
|
4.
439 + 498 =
2
937
|
|
5.
459 + 401 =
2
860
|
6.
929 + 5 =
934
2
|
7.
33 – 6 =
27
2
|
8.
686 + 121 =
2
807
|
|
9.
17 + 339 =
356
2
|
10.
784 + 88 =
872
2
|
11.
282 – 224 =
2
58
|
12.
981 + 3 =
984
2
|
|
13.
502 – 225 =
2
277
|
14.
366 + 81 =
447
2
|
15.
177 – 35 =
142
2
|
16.
849 + 142 =
2
991
|
|
17.
57 + 244 =
2
301
|
18.
998 + 1 =
999
2
|
19.
232 – 19 =
2
213
|
20.
429 – 125 =
2
304
|