Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
12 + 340 =
352
2
|
2.
638 + 279 =
917
2
|
3.
428 + 446 =
2
874
|
4.
204 + 436 =
2
640
|
|
5.
294 – 164 =
2
130
|
6.
312 + 457 =
769
2
|
7.
819 + 138 =
957
2
|
8.
66 + 29 =
2
95
|
|
9.
242 – 124 =
2
118
|
10.
164 + 521 =
2
685
|
11.
832 – 302 =
2
530
|
12.
608 + 243 =
2
851
|
|
13.
298 – 101 =
197
2
|
14.
828 + 147 =
2
975
|
15.
132 – 130 =
1
2
|
16.
844 + 144 =
2
988
|
|
17.
359 – 242 =
117
2
|
18.
411 + 499 =
910
2
|
19.
606 + 98 =
2
704
|
20.
337 – 60 =
2
277
|