Question

a)  \(\frac{2}{3}\)x \(\frac{4}{7}\);

b)\(\frac{3}{11}\)x 2 ;

c) 4 x \(\frac{2}{7}\);

d) \(\frac{8}{21}\): \(\frac{2}{3}\);

e) \(\frac{3}{7}\)x \(\frac{7}{3}\);

f) \(\frac{3}{7}\): \(\frac{3}{7}\);

g) \(\frac{2}{3}\)x \(\frac{1}{6}\)x \(\frac{9}{11}\);

h) \(\frac{2x3x4}{2x3x4x5}\).

Answer 1

\(\frac{2}{3}.\frac{4}{7}=\frac{8}{21}\)

\(\frac{3}{11}.2=\frac{6}{11}\)

\(4.\frac{2}{7}=\frac{8}{7}\)

\(\frac{8}{21}:\frac{2}{3}=\frac{8}{21}.\frac{3}{2}=\frac{21}{2.21}=\frac{1}{2}\)

\(\frac{3}{7}.\frac{7}{3}=\frac{21}{21}=1\)

\(\frac{3}{7}:\frac{3}{7}=\frac{3}{7}.\frac{7}{3}=\frac{21}{21}=1\)

Answer 2

lỡ tay bấm gửi trả lời luôn

\(\frac{2}{3}.\frac{1}{6}.\frac{9}{11}=\frac{2.9}{18.11}=\frac{2.9}{2.9.11}=\frac{1}{11}\)

\(\frac{2.3.4}{2.3.4.5}=\frac{6.4}{6.4.5}=\frac{24}{24.5}=\frac{1}{5}\)

Answer 3

\(a,\frac{2}{3}\times\frac{4}{7}=\frac{8}{21}\)

\(b,\frac{3}{11}\times2=\frac{6}{11}\)

\(c,4\times\frac{2}{7}=\frac{8}{7}\)

\(d,\frac{8}{21}:\frac{2}{3}=\frac{8}{21}\times\frac{3}{2}=\frac{2\times4\times3}{3\times7\times2}=\frac{4}{7}\)

\(e,\frac{3}{7}\times\frac{7}{3}=1\)

\(f,\frac{3}{7}:\frac{3}{7}=\frac{3}{7}\times\frac{7}{3}=1\)

\(g,\frac{2}{3}\times\frac{1}{6}\times\frac{9}{11}=\frac{2\times1\times3\times3}{3\times3\times2\times11}=\frac{1}{11}\)

\(h,\frac{2\times3\times4}{2\times3\times4\times5}=\frac{1}{5}\)

Học tốt

Answer 4

a , \(\frac{8}{21}\)

b , \(\frac{6}{11}\)

c, \(\frac{8}{7}\)

d,\(=\frac{8}{21}\)\(.\frac{3}{2}\)\(=\frac{1}{2}\)

e, \(\frac{21}{21}\)\(=1\)

f , \(=\frac{3}{7}\)\(.\frac{7}{3}\)\(=\frac{21}{21}\)\(=1\)

g , \(=\frac{2.1.3.3}{3.3.2.11}\)\(=\frac{1}{11}\)

h , \(=\frac{1}{5}\)

Answer 5

a)\(\frac{2}{3}\times\frac{4}{7}=\frac{8}{21}\)

b)\(\frac{3}{11}\times2=\frac{6}{11}\)

c)\(4\times\frac{2}{7}=\frac{8}{7}\)

d)\(\frac{8}{21}:\frac{2}{3}=\frac{8:2}{21:3}=\frac{4}{7}\)

e)\(\frac{3}{7}\times\frac{7}{3}=1\)

f)\(=e)=1\)

g)\(\frac{2}{3}\times\frac{1}{6}\times\frac{9}{11}=\frac{2\times1\times9}{3\times6\times11}=\frac{2\times1\times3\times3}{3\times2\times3\times11}=\frac{1}{11}\)

h)\(\frac{2\times3\times4}{2\times3\times4\times5}=1\)

Lần sau bạn thêm đề bài vào nhé.

Chúc bạn học tốt.

Answer 6

a ) \(\frac{2}{3}\cdot\frac{4}{7}=\frac{8}{21}\)

b ) \(\frac{3}{11}\cdot2=\frac{6}{11}\)

c ) \(4\cdot\frac{2}{7}=\frac{8}{7}\)

d ) \(\frac{8}{21}\div\frac{2}{3}=\frac{4}{7}\)

e ) \(\frac{3}{7}\cdot\frac{7}{3}=1\)

f ) \(\frac{3}{7}\div\frac{3}{7}=1\)

g ) \(\frac{2}{3}\cdot\frac{1}{6}\cdot\frac{9}{11}=\frac{1}{11}\)

h ) \(\frac{2\cdot3\cdot4}{2\cdot3\cdot4\cdot5}=1\)