Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
664 – 303 =
361
2
|
2.
340 + 426 =
766
2
|
3.
709 + 291 =
2
1000
|
4.
37 – 21 =
2
16
|
|
5.
910 + 46 =
2
956
|
6.
608 – 128 =
2
480
|
7.
50 + 755 =
805
2
|
8.
565 + 179 =
744
2
|
|
9.
375 + 459 =
2
834
|
10.
217 + 193 =
2
410
|
11.
491 + 356 =
2
847
|
12.
247 – 24 =
223
2
|
|
13.
810 + 178 =
988
2
|
14.
175 – 70 =
105
2
|
15.
615 + 124 =
2
739
|
16.
314 + 173 =
2
487
|
|
17.
155 – 3 =
152
2
|
18.
680 + 67 =
747
2
|
19.
786 – 727 =
59
2
|
20.
525 + 433 =
2
958
|