Question

Verify: i) 20× {(-19) + 5} = {20 × (-19) + 20 × 5}​

Answer 1

Answer:

a) distributive property

20 \times ( - 19 + 5) = ( (- 19 \times 20 )+(5 \times 20))20×(−19+5)=((−19×20)+(5×20))

20 \times ( - 14) = ( - 380 + 100)20×(−14)=(−380+100)

- 280 = - 280−280=−280

b) associative property

(2400) \times 12 = - 60 \times ( - 480)(2400)×12=−60×(−480)

28800 = 2880028800=28800

Answer 2

Answer:

a) distributive property

20 × (-19 + 5) = ((−19 × 20) + (5 × 20))

20 × (-14) = (-380 + 100)

-280 = -280

b) associative property

(2400) x 12 = -60 × (-480)

28800 = 28800