Question

observa exercitile apoi aplica proprietatile inmultirii pentru a calcula rapid
A 4×67×25
B 50×145×2
C 4×315+6×315

Answer 1

A ) = (4 x 25) x 67 = 100 x 67 = 6700

B ) = (50 x 2) x 145 = 100 x 145 = 14500

C ) = 315 x (4 + 6) = 315 x 10 = 315 x 10 = 3150

Answer 2

a)  

4 × 67 × 25 = 67 × ( 4 × 25 ) = 67 × 100 = 6 700  → am aplicat asociativitatea, ca proprietate a inmultirii

b)

50 × 145 × 2 = 145 × ( 50 × 2 ) = 145 × 100 = 14 500 → asociativitate

c)

4 × 315 + 6 × 315 = 315 × ( 4 + 6 ) = 315 × 10 = 3150 → am aplicat distributivitatea inmultirii fata de adunare