Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
764 – 554 =
210
2
|
2.
72 – 9 =
2
63
|
3.
666 + 278 =
2
944
|
4.
222 – 142 =
80
2
|
|
5.
112 – 69 =
43
2
|
6.
406 + 362 =
2
768
|
7.
616 + 86 =
702
2
|
8.
640 + 360 =
2
1000
|
|
9.
801 + 178 =
2
979
|
10.
700 – 71 =
2
629
|
11.
494 + 143 =
2
637
|
12.
257 + 133 =
2
390
|
|
13.
375 – 96 =
2
279
|
14.
816 – 493 =
2
323
|
15.
290 – 237 =
53
2
|
16.
142 + 290 =
2
432
|
|
17.
949 – 211 =
2
738
|
18.
613 + 17 =
630
2
|
19.
680 – 677 =
3
1
|
20.
946 + 21 =
2
967
|