Question

a]1/3 + 3/4 - 7/12

b]6/11 chia 5/22 -4/5

c]5/18 nhân 8

d]7/15 chia 5

Answer 1

a) 1/3 + 3/4 - 7/12 

= 4/12 + 9/12 - 7/12

= 6/12

= 1/2 

b) 6/11 : 5/22 - 4/5

= 6/11 * 22/5 - 4/5

= 12/5 - 4/5 

= 8/5

c) 5/18 * 8

= 40/18

= 20/9

d) 7/15 : 5

= 7/15 * 1/5

= 7/75

OK

Answer 2

a, \(\frac{1}{3}+\frac{3}{4}-\frac{7}{12}\)

= \(\frac{13}{12}-\frac{7}{12}\)

= \(\frac{1}{2}\)

\(b,\frac{6}{11}:\frac{5}{22}-\frac{4}{5}\)

= \(\frac{12}{5}-\frac{4}{5}\)

\(=\frac{8}{5}\)

\(c,\frac{5}{18}x8\)

=\(\frac{20}{9}\)

\(d,\frac{7}{15}:5\)

= \(\frac{7}{15}x\)\(\frac{1}{5}\)

\(=\frac{7}{75}\)