Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
766 – 334 =
432
2
|
2.
493 – 311 =
182
2
|
3.
306 + 227 =
533
2
|
4.
127 + 491 =
618
2
|
|
5.
578 + 128 =
706
2
|
6.
631 + 64 =
695
2
|
7.
907 + 43 =
950
2
|
8.
446 – 93 =
353
2
|
|
9.
819 – 563 =
256
2
|
10.
200 + 621 =
821
2
|
11.
277 – 118 =
2
159
|
12.
107 – 44 =
2
63
|
|
13.
793 – 589 =
204
2
|
14.
583 + 157 =
740
2
|
15.
660 – 660 =
0
2
|
16.
110 – 46 =
2
64
|
|
17.
875 + 3 =
878
2
|
18.
397 – 46 =
351
2
|
19.
34 + 402 =
2
436
|
20.
999 + 1 =
2
1000
|