Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
826 – 756 =
70
2
|
2.
87 + 202 =
289
2
|
3.
297 + 690 =
2
987
|
4.
177 – 171 =
6
1
|
|
5.
356 + 81 =
2
437
|
6.
159 + 337 =
2
496
|
7.
784 – 611 =
173
2
|
8.
727 + 175 =
2
902
|
|
9.
237 + 561 =
2
798
|
10.
67 – 16 =
51
2
|
11.
232 – 214 =
18
2
|
12.
400 – 349 =
2
51
|
|
13.
699 – 560 =
2
139
|
14.
56 – 25 =
2
31
|
15.
646 – 560 =
2
86
|
16.
369 – 275 =
94
2
|
|
17.
506 + 5 =
511
2
|
18.
584 – 481 =
2
103
|
19.
429 – 244 =
185
2
|
20.
365 + 210 =
2
575
|