Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
280 – 164 =
116
2
|
2.
190 – 154 =
2
36
|
3.
33 – 15 =
18
2
|
4.
828 + 138 =
2
966
|
|
5.
144 + 274 =
2
418
|
6.
290 + 305 =
595
2
|
7.
283 + 304 =
2
587
|
8.
91 – 16 =
75
2
|
|
9.
230 – 102 =
128
2
|
10.
815 + 157 =
972
2
|
11.
734 – 131 =
603
2
|
12.
875 – 808 =
67
2
|
|
13.
957 + 7 =
2
964
|
14.
70 – 13 =
57
2
|
15.
171 + 378 =
2
549
|
16.
728 – 238 =
490
2
|
|
17.
336 + 226 =
562
2
|
18.
454 + 485 =
939
2
|
19.
503 – 22 =
481
2
|
20.
530 – 502 =
28
2
|