Question

efectueaza in doua moduri: 5x(5+9) , 8x(6-3) , (2+3)x9 ,(5 -3)x6   Ajutor va rog dau coroana

Answer 1

5 × ( 5 + 9 ) = 5 × 14 = 70 → primul mod

= 5 × 5 + 5 × 9 = 25 + 45 = 70 → al doilea mod

____________________________________

8 × ( 6 - 3 ) = 8 × 3 = 24 → primul mod

= 8 × 6 - 8 × 3 = 48 - 24 = 24 → al doilea mod

___________________________________

( 2 + 3 ) × 9 = 5 × 9 = 45 → primul mod

= 2 × 9 + 3 × 9 = 18 + 27 = 45 → al doilea mod

____________________________________

( 5 - 3 ) × 6 = 2 × 6 = 12 → primul mod

= 5 × 6 - 3 × 6 = 30 - 18 = 12 → al doilea mod