Question

tính : 

a.   4 phần 7 + 3 phần 5 - 1 phần 2 

b.   5 + 1 phần 6 - 2 phần 5 + 3 phần 8 

Answer 1

\(a,\frac{4}{7}+\frac{3}{5}-\frac{1}{2}=\frac{41}{35}-\frac{1}{2}=\frac{47}{70}.\)

\(b,5+\frac{1}{6}-\frac{2}{5}+\frac{3}{8}=\frac{31}{6}-\frac{2}{5}+\frac{3}{8}=\frac{143}{30}-\frac{3}{8}=\frac{527}{20}\)~~~

Answer 2

\(\frac{4}{7}+\frac{3}{5}-\frac{1}{2}\)

\(=\frac{47}{70}\)

\(5+\frac{1}{6}-\frac{2}{5}+\frac{3}{8}\)

\(=\frac{617}{120}\)

Answer 3

\(\frac{4}{7}+\frac{3}{5}-\frac{1}{2}\)

\(=\frac{40}{70}+\frac{36}{70}-\frac{35}{70}\)

\(=\frac{76}{70}-\frac{35}{70}\)

\(=\frac{41}{70}\)

b)\(5+\frac{1}{6}-\frac{2}{5}+\frac{3}{8}\)

\(=\frac{1200}{240}+\frac{40}{240}-\frac{96}{240}+\frac{90}{240}\)

\(=\frac{1200+40-96+90}{240}\)

\(=\frac{1234}{240}\)

Answer 4

617/120

Answer 5

\(\frac{4}{7}+\frac{3}{5}-\frac{1}{2}\)

\(=\frac{40}{70}+\frac{36}{70}-\frac{35}{70}\)

\(=\frac{76}{70}-\frac{35}{70}\)

\(=\frac{41}{70}\)

Answer 6

?????????????????????????

Answer 7

2/5+1/6+3/5