Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
484 + 426 =
2
910
|
2.
158 – 115 =
2
43
|
3.
866 + 48 =
2
914
|
4.
555 – 123 =
432
2
|
|
5.
416 + 225 =
641
2
|
6.
530 + 249 =
779
2
|
7.
470 + 406 =
2
876
|
8.
875 – 383 =
2
492
|
|
9.
793 – 360 =
2
433
|
10.
304 – 118 =
186
2
|
11.
18 – 15 =
3
1
|
12.
375 + 275 =
2
650
|
|
13.
937 + 47 =
984
2
|
14.
16 – 11 =
1
5
|
15.
109 – 16 =
2
93
|
16.
698 – 313 =
385
2
|
|
17.
281 – 278 =
3
1
|
18.
129 – 55 =
2
74
|
19.
981 – 117 =
2
864
|
20.
20 – 1 =
19
2
|