Question

Tính :

a, \(\frac{2}{3}\times\frac{3}{2}\)

b, \(\frac{4}{7}\times\frac{7}{4}\)

Answer 1

a)=1.

b)=1.

Answer 2

a,   \(2\over3\) x \(3\over2\)=\(6\over6 \)=1

b,   \(4\over7\) x \(7\over4\)=\(28\over28\)=1

Answer 3

\(\frac{2}{3}.\frac{3}{2}=1\)

\(\frac{4}{7}.\frac{7}{4}=1\)

chú ý : 2 phân số nghịch đảo có tích = 1

Answer 4

a, = 1

b, = 1

Nhớ k cho mình nha

Answer 5

a) \(\frac{2}{3}\).\(\frac{3}{2}\)=\(\frac{2.3}{3.2}\)=1

b)\(\frac{4}{7}\).\(\frac{7}{4}\)=\(\frac{4.7}{7.4}\)=1

Answer 6

a) \(\frac{2}{3}x\frac{3}{2}=\frac{6}{6}=1\)

b)\(\frac{4}{7}x\frac{7}{4}=\frac{28}{28}=1\)

Answer 7

a ) \(\frac{2}{3}\)x\(\frac{3}{2}=\frac{6}{6}=1\)

b ) \(\frac{4}{7}\)x \(\frac{7}{4}=\frac{28}{28}=1\)

Answer 8

a) 1

b)1