Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
996 – 586 =
410
2
|
2.
257 – 32 =
2
225
|
3.
375 + 45 =
2
420
|
4.
130 – 20 =
110
2
|
|
5.
357 – 91 =
2
266
|
6.
622 + 231 =
2
853
|
7.
496 – 480 =
2
16
|
8.
5 – 3 =
1
2
|
|
9.
697 + 234 =
931
2
|
10.
1 + 283 =
284
2
|
11.
792 – 691 =
101
2
|
12.
953 – 58 =
895
2
|
|
13.
316 + 79 =
2
395
|
14.
255 + 183 =
2
438
|
15.
709 – 647 =
2
62
|
16.
158 – 78 =
2
80
|
|
17.
8 + 634 =
2
642
|
18.
347 – 63 =
2
284
|
19.
285 – 137 =
148
2
|
20.
684 + 48 =
2
732
|