Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
953 – 519 =
434
2
|
2.
913 – 698 =
215
2
|
3.
167 + 459 =
2
626
|
4.
98 – 6 =
2
92
|
|
5.
56 – 21 =
35
2
|
6.
423 – 5 =
418
2
|
7.
936 – 293 =
2
643
|
8.
799 + 79 =
878
2
|
|
9.
227 – 163 =
64
2
|
10.
354 + 161 =
2
515
|
11.
360 – 280 =
2
80
|
12.
253 + 498 =
2
751
|
|
13.
630 – 558 =
72
2
|
14.
267 – 126 =
2
141
|
15.
650 + 42 =
2
692
|
16.
188 + 402 =
590
2
|
|
17.
454 – 422 =
32
2
|
18.
213 + 223 =
2
436
|
19.
221 + 144 =
2
365
|
20.
905 – 479 =
2
426
|