Question

Tính nhanh :

3/9 x 77/79 + 3/9 x 2/79

Answer 1

1/3

Answer 2

3/9x( 77/79+ 2/79)

=3/9 x 1

=3/9

Answer 3

3/9 x 77/79 + 3/9 x 2/79

= 3/9 x (77/79 + 2/79)

= 3/9 x 1

= 3/9

Answer 4

(77/79+2/79)x3/9

=1x3/9=3/9=1/3

Answer 5

=3/9 x (77/79 + 2/79)

=3/9 x 1

=3/9

Answer 6

= 3/9

Answer 7

( 77/79 + 2/79 ) x 3/9

= 72/79 x 3/9

= 216/711= 72/237=24/79

 

CHƯA CHẮC NHÉ

Answer 8

\(=\dfrac{3}{9}\times\left(\dfrac{77}{79}+\dfrac{2}{79}\right)\)

\(=\dfrac{3}{9}\times1\)

\(=\dfrac{3}{9}=\dfrac{1}{3}\)