1) Υπολογίζω και συμπληρώνω τον αριθμό που λείπει:
50 + 30 = ........
90 - 40 = ........
100 - 20 = .........
30 + .... = 100
30 + ..... = 60
40 + .... = 90
6 + 9 = .....
17 - 8 = .....
14 - 9 = .....
60 20 90 60 80
+20 +50 -30 -30 -40
_____ _____ _____ _____ _____
2) Γράφω τον αριθμό που βρίσκεται πριν και μετά:
45 46 47
... 54 ...
... 77 ...
... 62 ...
.... 88 .....
.... 99 ......
..... 79 ......
..... 70 .....
.... 90 ......
..... 81 ......
50 + 30 = ........
90 - 40 = ........
100 - 20 = .........
30 + .... = 100
30 + ..... = 60
40 + .... = 90
6 + 9 = .....
17 - 8 = .....
14 - 9 = .....
60 20 90 60 80
+20 +50 -30 -30 -40
_____ _____ _____ _____ _____
2) Γράφω τον αριθμό που βρίσκεται πριν και μετά:
45 46 47
... 54 ...
... 77 ...
... 62 ...
.... 88 .....
.... 99 ......
..... 79 ......
..... 70 .....
.... 90 ......
..... 81 ......