Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
977 – 213 =
2
764
|
2.
299 + 517 =
816
2
|
3.
771 – 514 =
257
2
|
4.
849 + 128 =
2
977
|
|
5.
172 – 167 =
5
1
|
6.
711 – 490 =
221
2
|
7.
395 – 291 =
2
104
|
8.
820 – 130 =
690
2
|
|
9.
515 – 40 =
2
475
|
10.
25 + 185 =
210
2
|
11.
485 – 373 =
112
2
|
12.
760 + 25 =
785
2
|
|
13.
521 + 102 =
2
623
|
14.
454 – 323 =
131
2
|
15.
10 – 10 =
2
0
|
16.
243 – 207 =
2
36
|
|
17.
499 – 449 =
50
2
|
18.
124 + 686 =
2
810
|
19.
11 – 4 =
1
7
|
20.
578 + 365 =
2
943
|