Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
226 – 135 =
91
2
|
2.
110 + 617 =
727
2
|
3.
521 + 169 =
690
2
|
4.
854 + 30 =
884
2
|
|
5.
185 + 662 =
847
2
|
6.
706 + 175 =
2
881
|
7.
978 + 21 =
2
999
|
8.
382 + 353 =
735
2
|
|
9.
309 – 6 =
303
2
|
10.
71 + 261 =
332
2
|
11.
270 – 21 =
249
2
|
12.
79 – 1 =
78
2
|
|
13.
700 + 221 =
921
2
|
14.
717 – 615 =
102
2
|
15.
248 – 241 =
1
7
|
16.
977 – 254 =
723
2
|
|
17.
124 + 215 =
2
339
|
18.
658 + 106 =
2
764
|
19.
425 – 341 =
84
2
|
20.
368 + 144 =
512
2
|