Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
988 + 0 =
2
988
|
2.
244 – 151 =
93
2
|
3.
131 + 487 =
2
618
|
4.
318 – 125 =
2
193
|
|
5.
14 + 870 =
2
884
|
6.
821 – 503 =
318
2
|
7.
498 – 326 =
2
172
|
8.
506 + 32 =
2
538
|
|
9.
520 – 175 =
2
345
|
10.
506 + 9 =
515
2
|
11.
270 – 165 =
105
2
|
12.
110 – 91 =
2
19
|
|
13.
508 – 253 =
2
255
|
14.
873 + 14 =
887
2
|
15.
386 – 298 =
2
88
|
16.
377 – 234 =
2
143
|
|
17.
550 + 338 =
888
2
|
18.
243 + 722 =
2
965
|
19.
811 – 609 =
2
202
|
20.
243 – 202 =
41
2
|