Question

A= -4/7. 2/9+ -4/7.7/9 + 18/7

ai nhanh mk tk cho nhé

Answer 1

A=-4/7.2/9+-4/7.7/9+18/7

  = -4/7.(2/9+7/9)+18/7

  = -4/7.1+18/7=-4/7+18/7=14/7=2

Answer 2

A= -4/7. 2/9+ -4/7.7/9 + 18/7

A =-4/7.(2/9+7/9)+18/7

A =4/7.1+18/7

A=4/7+18/7

A=22/7

Answer 3

A= -4/7. 2/9+ -4/7.7/9 + 18/7

A=-4/7(2/9+7/9)+18/7

A= -4/7. 1 +18/7

A=-4/7 + 18/7

A=14/7

A=2

Vậy A=2

ĐÂY MK TẶNG CẬU> MK CHÚC CẬU HK TỐT!

Answer 4

-4/7.2/9+ -4/7.7/9+18/7

=-4/7(2/9+7/9)+18/7

= -4/7 .1+18/7

= -4/7+18/7

=14/7=2