Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
439 – 140 =
2
299
|
2.
760 – 415 =
345
2
|
3.
163 + 502 =
665
2
|
4.
330 – 177 =
153
2
|
|
5.
713 – 128 =
2
585
|
6.
89 – 1 =
88
2
|
7.
599 + 394 =
993
2
|
8.
427 – 186 =
241
2
|
|
9.
711 + 41 =
2
752
|
10.
499 + 366 =
2
865
|
11.
361 + 633 =
2
994
|
12.
485 + 368 =
853
2
|
|
13.
968 + 24 =
2
992
|
14.
475 – 323 =
152
2
|
15.
682 – 419 =
263
2
|
16.
593 – 474 =
2
119
|
|
17.
20 – 20 =
0
2
|
18.
354 – 18 =
2
336
|
19.
331 + 247 =
578
2
|
20.
20 – 2 =
2
18
|