Câu hỏi của Nguyễn Trâm Anh

Question

4/9: 5/7=
5/7: 4/9=
Hãy giúp tôi
1/3:1/4=
1/4:1/3=
Giải giúp tôi

⚚ßé Só¡⁀ᶦᵈᵒᶫ · Accepted Answer

$\frac{4}{9}:\frac{5}{7}=\frac{4}{9}\times\frac{7}{5}=\frac{4\times7}{9\times5}=\frac{28}{45}$

$\frac{5}{7}:\frac{4}{9}=\frac{5}{7}\times\frac{9}{4}=\frac{5\times9}{7\times4}=\frac{45}{28}$

$\frac{1}{3}:\frac{1}{4}=\frac{1}{3}\times4=\frac{4}{3}$

$\frac{1}{4}:\frac{1}{3}=\frac{1}{4}\times3=\frac{3}{4}$

Câu trả lời:

$\frac{4}{9}:\frac{5}{7}=\frac{4}{9}\times\frac{7}{5}=\frac{4\times7}{9\times5}=\frac{28}{45}$

$\frac{5}{7}:\frac{4}{9}=\frac{5}{7}\times\frac{9}{4}=\frac{5\times9}{7\times4}=\frac{45}{28}$

$\frac{1}{3}:\frac{1}{4}=\frac{1}{3}\times4=\frac{4}{3}$

$\frac{1}{4}:\frac{1}{3}=\frac{1}{4}\times3=\frac{3}{4}$