Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
120 + 530 =
650
2
|
2.
513 + 341 =
854
2
|
3.
445 + 399 =
2
844
|
4.
939 + 23 =
2
962
|
|
5.
521 + 4 =
2
525
|
6.
226 – 50 =
2
176
|
7.
410 + 96 =
2
506
|
8.
77 + 161 =
2
238
|
|
9.
986 + 3 =
2
989
|
10.
46 + 46 =
2
92
|
11.
149 + 250 =
2
399
|
12.
420 + 435 =
2
855
|
|
13.
458 – 365 =
2
93
|
14.
541 + 388 =
929
2
|
15.
596 – 333 =
2
263
|
16.
217 – 217 =
2
0
|
|
17.
996 – 194 =
2
802
|
18.
225 – 185 =
2
40
|
19.
245 – 84 =
161
2
|
20.
637 + 210 =
847
2
|