Question

Tính nhanh k ghi mỗi kết quả

Answer 1

\(=\dfrac{5}{36}+\dfrac{12}{108}=\dfrac{15}{108}+\dfrac{12}{108}=\dfrac{27}{108}=\dfrac{1}{4}\)

Answer 2

=5/9 x 1/4 + 4/9 x 1/4

= (5/9 + 4/9) x 1/4

= 1 x 1/4

= 1/4

Vậy giá trị biểu thức là 1/4

Answer 3

\(\dfrac{5}{9}\times\dfrac{1}{4}+\dfrac{4}{9}\times\dfrac{3}{12}\)

\(=\left(\dfrac{5}{9}+\dfrac{4}{9}\right)\times\dfrac{1}{4}\) ( Rút gọn \(\dfrac{3}{12}\))

\(=1\times\dfrac{1}{4}=\dfrac{1}{4}\)

Answer 4

5/9x1/4+4/9x3/12=(5/9+4/9)x(1/4x1/4)=1x1/8=1/8

Answer 5

\(\dfrac{5}{9}\) x \(\dfrac{1}{4}\) + \(\dfrac{4}{9}\) x \(\dfrac{3}{12}\)

= \(\left(\dfrac{5}{9}+\dfrac{4}{9}\right)\) x \(\dfrac{1}{4}\) ( rút gọn \(\dfrac{3}{12}\) )

= 1 x \(\dfrac{1}{4}\) = \(\dfrac{1}{4}\)

Answer 6

=5/9 x 1/4 + 4/9 x 1/4

= (5/9 + 4/9) x 1/4

= 1 x 1/4

= 1/4