Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
783 – 601 =
2
182
|
2.
981 – 584 =
397
2
|
3.
454 + 144 =
598
2
|
4.
521 – 514 =
1
7
|
|
5.
173 + 394 =
567
2
|
6.
731 + 265 =
996
2
|
7.
351 – 243 =
108
2
|
8.
186 + 337 =
2
523
|
|
9.
899 + 54 =
953
2
|
10.
54 – 48 =
1
6
|
11.
69 + 629 =
698
2
|
12.
935 – 678 =
257
2
|
|
13.
401 + 258 =
659
2
|
14.
598 + 339 =
937
2
|
15.
396 – 152 =
2
244
|
16.
155 – 1 =
154
2
|
|
17.
392 + 36 =
428
2
|
18.
523 + 13 =
2
536
|
19.
160 + 26 =
2
186
|
20.
965 + 24 =
2
989
|