Question

use the commutative and associative property to simplify the following :
1) 319+69+81
2) 431+37+69+63
3) 2 × ( 71 × 5)
4) 50 × 17 × 2 ​

Answer 1

Answer:

469

600

710

1700

Step-by-step explanation:

in first part add 319+81 and then 69

in second part add 431+69 and then 63+37 and then add their sums

multiply 5×2 and then 71

multiply 50×2 and then 17

Answer 2

Step-by-step explanation:

319+69+81

319+(69+81)

=319+(81+69)(associative property)

(319+81)+69(communicative property)

=400+69=469