Question

folosind asociativitate si comutativitate inmultiri, efectuati )2×37×5 b) 2×25×17×5×4 c) 250×2×4×579×5

Answer 1

a)   2 × 37 × 5 = 37 × ( 2 × 5 ) = 37 × 10 = 370

b)   2 × 25 × 17 × 5 × 4 = 17 × ( 25 × 4 ) × ( 2 × 5 ) = 17 × 100 × 10 = 17 000

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

=  579 × 1 000 × 10 =

= 5 790 000