Question

a) 7 + 3/4 - 5/6 = ?

b) 8 x 4/5 : 6/7 = ?

c) 1/2 + 2/3 + 3/4 = ?

d) 4/5 + 5/4 + 7/20 = ?

 

Answer 1

a: =84/12+9/12-10/12=83/12

b: =32/5x7/6=224/30=112/15

c: =6/12+8/12+9/12=23/12

d: =16/20+25/20+7/20=48/20=12/5

Answer 2

a) 7 + 3/4 - 5/6 = 83/12

b) 8 x 4/5 : 6/7 = 8 x 4/5 x 7/6 = 112/15

c) 1/2 + 2/3 + 3/4 = 23/12

d) 4/5 + 5/4 + 7/20 = 12/5

Answer 3

84/12+9/12-10/12=83/12

32/5x7/6=224/30=112/15

6/12+8/12+9/12=23/12

16/20+25/20+7/20=48/20=12/5

Answer 4

a) = 83/12

b) = 112/15

c) = 23/12

d) = 12/5

Answer 5

a) 7 + 3/4 - 5/6 = 83/12

b) 8 x 4/5 : 6/7 = 8 x 4/5 x 7/6 = 112/15

c) 1/2 + 2/3 + 3/4 = 23/12

d) 4/5 + 5/4 + 7/20 = 12/5

Answer 6

a) \(7+\dfrac{3}{4}-\dfrac{5}{6}=\dfrac{7}{1}+\dfrac{3}{4}-\dfrac{5}{6}=\dfrac{84}{12}+\dfrac{9}{12}-\dfrac{10}{12}=\dfrac{83}{12}\)

b) \(8\times\dfrac{4}{5}:\dfrac{6}{7}=\dfrac{32}{5}:\dfrac{6}{7}=\dfrac{32}{5}\times\dfrac{7}{6}=\dfrac{224}{30}=\dfrac{112}{15}\)

c) \(\dfrac{1}{2}+\dfrac{2}{3}+\dfrac{3}{4}=\dfrac{6}{12}+\dfrac{8}{12}+\dfrac{9}{12}=\dfrac{23}{12}\)

d) \(\dfrac{4}{5}+\dfrac{5}{4}+\dfrac{7}{20}=\dfrac{16}{20}+\dfrac{25}{20}+\dfrac{7}{20}=\dfrac{48}{20}=\dfrac{12}{5}\)