Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
886 – 378 =
508
2
|
2.
679 – 398 =
2
281
|
3.
496 + 148 =
644
2
|
4.
217 + 546 =
2
763
|
|
5.
227 – 147 =
80
2
|
6.
236 + 283 =
519
2
|
7.
999 + 1 =
2
1000
|
8.
843 + 86 =
2
929
|
|
9.
619 – 117 =
2
502
|
10.
749 – 454 =
2
295
|
11.
923 + 3 =
926
2
|
12.
572 + 258 =
830
2
|
|
13.
199 – 142 =
57
2
|
14.
625 + 346 =
971
2
|
15.
966 + 10 =
976
2
|
16.
166 – 38 =
2
128
|
|
17.
654 + 271 =
925
2
|
18.
694 – 181 =
513
2
|
19.
117 – 24 =
2
93
|
20.
372 – 202 =
2
170
|