Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
428 – 142 =
2
286
|
2.
620 – 476 =
144
2
|
3.
660 – 136 =
2
524
|
4.
66 + 423 =
2
489
|
|
5.
63 – 18 =
2
45
|
6.
396 + 388 =
784
2
|
7.
659 + 243 =
902
2
|
8.
135 + 164 =
2
299
|
|
9.
582 – 63 =
2
519
|
10.
307 + 412 =
719
2
|
11.
164 + 54 =
218
2
|
12.
628 + 350 =
2
978
|
|
13.
552 – 531 =
21
2
|
14.
308 – 143 =
2
165
|
15.
188 – 173 =
15
1
|
16.
346 + 96 =
2
442
|
|
17.
657 + 343 =
1000
2
|
18.
751 + 218 =
969
2
|
19.
354 + 526 =
2
880
|
20.
43 – 42 =
1
2
|