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Sottrai a 20


(1) Resta los números

12

-

9

= _____

10

-

2

= _____

19

-

1

= _____

15

-

8

= _____

13

-

3

= _____

17

-

10

= _____

19

-

9

= _____

11

-

6

= _____

18

-

7

= _____

16

-

7

= _____

11

-

4

= _____

19

-

10

= _____

18

-

8

= _____

10

-

9

= _____

14

-

10

= _____

(2) Resta los números y comprueba con la suma

13 - 9 = ___ porque 4 + 9 = _______
19 - 1 = ___ porque = _____________
12 - 9 = ___ porque = _____________
18 - 2 = ___ porque = _____________
19 - 8 = ___ porque = _____________
17 - 10 = ___ porque = _____________
10 - 6 = ___ porque = _____________
11 - 7 = ___ porque = _____________
15 - 7 = ___ porque = _____________
16 - 3 = ___ porque = _____________

(3) Calcula

,,,,,
,,,,,,,,,
,,,
10 + 6 = __
16 - 6 = __
10 + 10 = __
20 - 10 = __
10 + 4 = __
14 - 4 = __
,,,,,,
,,,,,,,,
,,,,
10 + 7 = __
17 - 7 = __
10 + 9 = __
19 - 9 = __
10 + 5 = __
15 - 5 = __

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