Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
665 – 457 =
2
208
|
2.
676 – 285 =
2
391
|
3.
307 – 204 =
103
2
|
4.
383 – 224 =
159
2
|
|
5.
923 + 77 =
1000
2
|
6.
503 + 208 =
711
2
|
7.
383 + 7 =
390
2
|
8.
352 – 163 =
189
2
|
|
9.
408 – 106 =
2
302
|
10.
725 + 204 =
2
929
|
11.
6 – 1 =
5
1
|
12.
767 – 412 =
355
2
|
|
13.
961 – 744 =
217
2
|
14.
232 – 149 =
2
83
|
15.
432 + 134 =
566
2
|
16.
116 – 27 =
2
89
|
|
17.
488 – 480 =
1
8
|
18.
850 + 149 =
999
2
|
19.
432 + 74 =
2
506
|
20.
141 + 285 =
426
2
|