Question

Quy đồng, tìm mẫu chung
A,5/27;4/30;4/20

B,8/33;3/22;9/44

C;7/40;11/60;17/90

Answer 1

a: 5/27=100/540

4/30=72/540

4/20=108/540

b: 8/33=32/132

3/22=18/132

9/44=27/132

c: 7/40=63/360

11/60=66/360

17/90=68/360

Answer 2

a,

\(MSC:450\)

\(\dfrac{5}{27}=\dfrac{5.20}{27.20}=\dfrac{100}{540}\)

\(\dfrac{4}{30}=\dfrac{4.18}{30.18}=\dfrac{72}{540}\)

\(\dfrac{4}{20}=\dfrac{4.27}{20.27}=\dfrac{108}{540}\)

b,

\(MSC:132\)

\(\dfrac{8}{33}=\dfrac{8.4}{33.4}=\dfrac{32}{132}\)

\(\dfrac{3}{22}=\dfrac{3.6}{22.6}=\dfrac{18}{132}\)

\(\dfrac{9}{44}=\dfrac{9.3}{44.3}=\dfrac{27}{132}\)

c,

\(MSC:360\)

\(\dfrac{7}{40}=\dfrac{7.9}{40.9}=\dfrac{63}{360}\)

\(\dfrac{11}{60}=\dfrac{11.6}{60.6}=\dfrac{66}{360}\)

\(\dfrac{17}{90}=\dfrac{17.4}{90.4}=\dfrac{68}{360}\)