Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
663 – 611 =
52
2
|
2.
493 + 20 =
513
2
|
3.
45 – 5 =
40
2
|
4.
98 – 43 =
2
55
|
|
5.
288 + 559 =
847
2
|
6.
358 – 328 =
2
30
|
7.
555 – 462 =
2
93
|
8.
624 – 249 =
2
375
|
|
9.
880 – 516 =
364
2
|
10.
284 – 181 =
2
103
|
11.
558 – 84 =
2
474
|
12.
835 + 144 =
2
979
|
|
13.
811 + 93 =
2
904
|
14.
339 + 225 =
2
564
|
15.
374 – 341 =
2
33
|
16.
803 + 124 =
2
927
|
|
17.
770 + 144 =
2
914
|
18.
525 + 24 =
549
2
|
19.
373 – 350 =
23
2
|
20.
286 – 254 =
32
2
|