\(\frac{69}{77}\times\frac{21}{11}=\frac{69\times21}{77\times11}=\frac{1449}{847}=\frac{207}{121}\)
\(\frac{69}{77}:\frac{21}{11}=\frac{69}{77}\times\frac{11}{21}=\frac{69\times11}{77\times21}=\frac{759}{1617}=\frac{23}{49}\)
\(\frac{66}{77}-\frac{21}{11}=\frac{66}{77}-\frac{147}{77}=\frac{66-147}{77}=\frac{-81}{77}\)
\(\frac{69}{77}+\frac{21}{11}=\frac{69}{77}+\frac{147}{77}=\frac{69+147}{77}=\frac{216}{77}\)
~ Hok tốt ~
\(\frac{69}{77}.\frac{21}{11}=\frac{207}{121}\)
\(\frac{69}{77}:\frac{21}{11}=\frac{23}{49}\)
\(\frac{69}{77}-\frac{21}{11}=-\frac{78}{77}\)
\(\frac{69}{77}+\frac{21}{11}=\frac{216}{77}\)
***
Bài làm
\(\frac{69}{77}x\frac{21}{11}=\frac{207}{121}\)
\(\frac{69}{77}:\frac{21}{11}=\frac{69}{77}x\frac{11}{21}=\frac{23}{49}\)
\(\frac{69}{77}-\frac{21}{11}=\frac{69}{77}-\frac{147}{77}=-\frac{78}{77}\)
\(\frac{69}{77}+\frac{21}{11}=\frac{69}{77}+\frac{147}{77}=\frac{216}{77}\)
# Chúc bạn học tốt #
\(\frac{69}{77}\times\frac{21}{11}=\frac{69\times21}{77\times11}=\frac{1449}{847}=\frac{207}{121}\)
\(\frac{69}{77}:\frac{21}{11}=\frac{69}{77}\times\frac{11}{21}=\frac{759}{1617}=\frac{23}{49}\)
\(\frac{69}{77}-\frac{21}{11}=\frac{69}{77}-\frac{147}{77}=\frac{-81}{77}\)
Trả lời:
\(\frac{69}{77}\times\frac{21}{11}=\frac{69\times21}{77\times11}=\frac{201}{121}\)
\(\frac{69}{77}:\frac{21}{11}=\frac{69}{77}\times\frac{11}{21}=\frac{23}{49}\)
\(\frac{69}{77}-\frac{21}{11}=\frac{-78}{77}\)
\(\frac{69}{77}+\frac{21}{11}=\frac{216}{77}\)
\(\frac{69}{77}\times\frac{21}{11}=\frac{207}{121}\)
\(\frac{69}{77}\div\frac{21}{11}=\frac{23}{49}\)
Trả lời:
Câu 1 :\(\frac{201}{121}\)
Câu 2 : \(\frac{49}{23}\)
Câu 3 :\(\frac{-78}{77}\)
Câu 4:\(\frac{216}{77}\)
~Hok tốt~