Question

quy đồng mẫu số các phân số 

2 phần 3 và 1 phần 5

 

3 phần 4 và 5 phần 8

 

5 phần 6 và 4 phần 9

Answer 1

a: 2/3=10/15

1/5=3/15

b: 3/4=6/8

5/8=5/8

c: 5/6=15/18

4/9=8/18

Answer 2

\(\dfrac{2}{3}=\dfrac{10}{15};\dfrac{1}{5}=\dfrac{3}{15}\)

\(\dfrac{3}{4}=\dfrac{24}{32};\dfrac{5}{8}=\dfrac{20}{32}\)

\(\dfrac{5}{6}=\dfrac{45}{54};\dfrac{4}{9}=\dfrac{24}{54}\)

Answer 3

a. \(\dfrac{2}{3}=\dfrac{2.5}{3.5}=\dfrac{10}{15};\dfrac{1}{5}=\dfrac{1.3}{5.3}=\dfrac{3}{15}\)

b.\(\dfrac{3}{4}=\dfrac{3.2}{4.2}=\dfrac{6}{8};\dfrac{5}{8}=\dfrac{5}{8}\)

\(\dfrac{5}{6}=\dfrac{5.3}{6.3}=\dfrac{15}{18};\dfrac{4}{9}=\dfrac{4.2}{9.2}=\dfrac{8}{18}\)

Answer 4

\(\dfrac{2}{3}=\dfrac{2\times5}{3\times5}=\dfrac{10}{15};\dfrac{1}{5}=\dfrac{1\times3}{5\times3}=\dfrac{3}{15}\\ \dfrac{3}{4}=\dfrac{3\times8}{4\times8}=\dfrac{24}{32};\dfrac{5}{8}=\dfrac{5\times4}{8\times4}=\dfrac{20}{32}\\ \dfrac{5}{6}=\dfrac{5\times9}{6\times9}=\dfrac{45}{54};\dfrac{4}{9}=\dfrac{4\times6}{9\times6}=\dfrac{24}{54}\)

Answer 5

a: 2/3=10/15

1/5=3/15

b: 3/4=6/8

5/8=5/8

c: 5/6=15/18

4/9=8/18