Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
375 + 509 =
2
884
|
2.
253 – 159 =
94
2
|
3.
198 – 169 =
2
29
|
4.
275 – 167 =
108
2
|
|
5.
49 – 27 =
2
22
|
6.
317 – 119 =
2
198
|
7.
913 + 71 =
984
2
|
8.
543 + 216 =
2
759
|
|
9.
838 – 794 =
44
2
|
10.
436 + 392 =
828
2
|
11.
24 – 13 =
11
1
|
12.
727 + 69 =
2
796
|
|
13.
845 – 230 =
2
615
|
14.
685 + 269 =
954
2
|
15.
365 + 43 =
408
2
|
16.
589 + 38 =
2
627
|
|
17.
233 + 68 =
2
301
|
18.
157 – 68 =
89
2
|
19.
906 + 31 =
937
2
|
20.
867 + 48 =
915
2
|