Question

3. Folosind asociativitatea şi comutativitatea înmulțirii, efectuați: a) 2.37.5; b) 2.25. 17.5.4; c) 250 -2.4.579.5.​

Answer 1

a) 2×5×37= 10×37= 370

b) 2×5×25×4×17= 10×100×17= 17000

c) 250×4×2×5×579= 1000×10×579= 5790000

Coroana???

Answer 2

Răspuns:

a) 2 × 37 × 5 = (2 × 37) × 5 = 2 × 5 × 37 = 370

b) 2 × 25 × 17 × 5 × 4 = (2 × 5 × 25) × (4 × 17) = 4 × 25 × 2 × 5 × 17 = 17000

c) 250 × 2 × 4 × 579 × 5 = (250 × 4) × (2 × 5 × 579) = 250 × 4 × 579 × 2 × 5 = 5790000