Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
632 – 556 =
2
76
|
2.
473 – 473 =
0
2
|
3.
143 – 117 =
2
26
|
4.
364 – 294 =
70
2
|
|
5.
879 + 3 =
2
882
|
6.
389 + 102 =
491
2
|
7.
131 + 301 =
2
432
|
8.
452 + 17 =
469
2
|
|
9.
498 + 32 =
2
530
|
10.
609 – 133 =
2
476
|
11.
643 + 48 =
691
2
|
12.
207 + 149 =
356
2
|
|
13.
784 + 42 =
826
2
|
14.
438 + 479 =
2
917
|
15.
20 – 11 =
9
1
|
16.
66 – 20 =
2
46
|
|
17.
109 + 783 =
892
2
|
18.
953 – 717 =
2
236
|
19.
194 + 444 =
638
2
|
20.
387 – 215 =
2
172
|