Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
418 – 161 =
257
2
|
2.
363 + 310 =
673
2
|
3.
36 + 804 =
2
840
|
4.
57 + 569 =
2
626
|
|
5.
851 – 595 =
256
2
|
6.
40 + 801 =
841
2
|
7.
139 + 37 =
2
176
|
8.
299 – 266 =
33
2
|
|
9.
399 + 377 =
2
776
|
10.
439 + 251 =
2
690
|
11.
680 + 295 =
2
975
|
12.
907 + 63 =
970
2
|
|
13.
933 + 15 =
948
2
|
14.
609 + 232 =
841
2
|
15.
965 – 135 =
830
2
|
16.
890 + 52 =
942
2
|
|
17.
735 – 377 =
358
2
|
18.
587 + 247 =
2
834
|
19.
264 – 124 =
2
140
|
20.
958 + 20 =
978
2
|