Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
98 + 813 =
2
911
|
2.
205 – 30 =
175
2
|
3.
50 – 5 =
2
45
|
4.
980 – 717 =
2
263
|
|
5.
96 – 8 =
2
88
|
6.
941 – 916 =
25
2
|
7.
672 – 326 =
2
346
|
8.
931 – 338 =
593
2
|
|
9.
892 – 205 =
687
2
|
10.
409 + 410 =
819
2
|
11.
548 + 388 =
936
2
|
12.
621 – 454 =
167
2
|
|
13.
212 – 207 =
1
5
|
14.
902 + 48 =
2
950
|
15.
627 – 134 =
493
2
|
16.
20 + 617 =
2
637
|
|
17.
366 – 203 =
2
163
|
18.
449 – 248 =
201
2
|
19.
613 – 469 =
2
144
|
20.
828 + 99 =
927
2
|