Question

a, 4  2/5 + 5  2/3 + 2  3/4 + 3/5 + 4/12 + 1/4 = ?

b, 41/27 x 13/18 - 13/18 x 14/27 =?

CAC BAN HAY LAM DIEN GIAI RA CHO MINH NHE  ....... MINH RAT CAM ON CAC BAN

 

Answer 1

a)\(4\frac{2}{5}+5\frac{2}{3}+2\frac{3}{4}+\frac{3}{5}+\frac{4}{12}+\frac{1}{4}\)

\(=\left(4\frac{2}{5}+\frac{3}{5}\right)+\left(5\frac{2}{3}+\frac{4}{12}\right)+\left(2\frac{3}{4}+\frac{1}{4}\right)\)

\(=5+6+3=14\)

b)\(\frac{41}{27}\cdot\frac{13}{18}-\frac{13}{18}\cdot\frac{14}{27}\)

\(=\frac{13}{18}\cdot\left(\frac{41}{27}-\frac{14}{27}\right)\)

\(=\frac{13}{18}\cdot1=\frac{13}{18}\)

Answer 2

TỚ CÁM ƠN BẠN NHIỀU CHỨC BẠN HỌC GIỎI NHÉ