Question

[Nguyễn Thị Thuý]

1 tính  a 6/7+3/14 chia 12 b 8/9-1/3 nhân 2/3

Answer 1

[Nguyễn Thị Thương Hoài]

a, \(\dfrac{6}{7}\) +  \(\dfrac{3}{14}\): 12

= \(\dfrac{6}{7}\) + \(\dfrac{3}{14}\) x \(\dfrac{1}{12}\)

= \(\dfrac{6}{7}\) + \(\dfrac{1}{56}\)

= \(\dfrac{48}{56}\) + \(\dfrac{1}{56}\)

= \(\dfrac{49}{56}\)

= \(\dfrac{7}{8}\)

b, \(\dfrac{8}{9}\) - \(\dfrac{1}{3}\) x  \(\dfrac{2}{3}\)

= \(\dfrac{8}{9}\) - \(\dfrac{2}{9}\)

= \(\dfrac{6}{9}\)

= \(\dfrac{2}{3}\)

Answer 2

[꧁ ༺ ςông_ςɧúα ༻ ꧂]

a)\(\dfrac{6}{7}+\dfrac{3}{14}:12\)

\(=\dfrac{6}{7}+\dfrac{3}{14}:\) \(\dfrac{12}{1}\)

\(=\dfrac{6}{7}+\dfrac{3}{14}.\dfrac{1}{12}\)

\(=\dfrac{6}{7}+\)\(\dfrac{1}{56}\)

\(=\) \(\dfrac{7}{8}\)

b)\(\dfrac{8}{9}-\dfrac{1}{3}\) \(.\dfrac{2}{3}\)

\(=\dfrac{8}{9}-\) \(\dfrac{2}{9}\)

\(=\dfrac{6}{9}=\dfrac{2}{3}\)

Lưu ý: Dấu chấm là nhân nha em.

Chúc e học tốt nha!☘