4

4.Fi de lucru nmulirea cu 21.Numr din 2 n 2 de la 0 la 20:_____________________________________________

2. Observ desenele i scrie operaiile:

a) Cte pere sunt n total?

____+ ____ + ____ + _____ = ____ De 4 ori cte 2:

_____ x _____ = _____

R: _____ pere

b) Ci porumbei sunt pe creang?

_____ + _____ + _____ + _____ + _____ + _____ = ______

De 6 ori cte 2:

______ x ______ = ______ R: _______ porumbei 3. Calculeaz i completeaz:

2 + 2+ 2 = ____ x ___ = ___

2 + 2 + 2 + 2 + 2 = ___ x ___ = ___

2 + 2 + 2 + 2 + 2 + 2 = ___ x ___ = ___

4. Taie rspunsurile greite:

4 x 2 = 10 ; 8 ; 16 2 x 5 = 5 ; 12 ; 10

9 x 2 = 16 ; 14 ; 18 2 x 7 = 14 ; 20 ; 18

10 x 2 = 12; 20 ; 10 2 x 8 = 16 ; 12 ; 8

5.Afl numerele de 2 ori mai mari dect: 5, 8, 7, 9.

_________________________ __________________________

_________________________ __________________________

6. Afl produsul numerelor: 2 i 4; 6 i 2; 2 i 10; 9 i 2.

__________________________ __________________________

__________________________ ___________________________

7. Dana are 7 nuci.Ana are de 2 ori mai multe.Cte nuci au cele dou fete?

Rezolvare

1.______________________________________________________

__________________________

2._____________________________________________________

___________________________

R:_____________________

4.Fi de lucru nmulirea cu 21.Numr din 2 n 2 de la 0 la 20:

_____________________________________________

2. Observ desenele i scrie operaiile:

a) Cte pere sunt n total?

____+ ____ + ____ + _____ = ____

De 4 ori cte 2:

_____ x _____ = _____

R: _____ pere

b) Ci porumbei sunt pe creang?

_____ + _____ + _____ + _____ + _____ + _____ = ______

De 6 ori cte 2:

______ x ______ = ______ R: _______ porumbei

3. Calculeaz i completeaz:

2 + 2+ 2 = ____ x ___ = ___

2 + 2 + 2 + 2 + 2 = ___ x ___ = ___

2 + 2 + 2 + 2 + 2 + 2 = ___ x ___ = ___

4. Taie rspunsurile greite:

4 x 2 = 10 ; 8 ; 16 2 x 5 = 5 ; 12 ; 10

9 x 2 = 16 ; 14 ; 18 2 x 7 = 14 ; 20 ; 18

10 x 2 = 12; 20 ; 10 2 x 8 = 16 ; 12 ; 8

5.Afl numerele de 2 ori mai mari dect: 5, 8, 7, 9.

_________________________ __________________________

_________________________ __________________________

6. Afl produsul numerelor: 2 i 4; 6 i 2; 2 i 10; 9 i 2.

__________________________ __________________________

__________________________ ___________________________

7. Dana are 7 nuci.Ana are de 2 ori mai multe.Cte nuci au cele dou fete?

Rezolvare

1.______________________________________________________

__________________________

2._____________________________________________________

___________________________

R:____________________