\(\frac{20152015}{20302030}\)=\(\frac{2015x10001}{2030x10001}\)=\(\frac{2015}{2030}\)=\(\frac{403x5}{406x5}\)=\(\frac{403}{406}\)

Tự chép đề bài nhé

=\(\frac{11.11.25.3.65.2.169}{3.13.2.30.11.18.11}\)

=\(\frac{25.65.13.13}{13.30.18}\)

=\(\frac{5.5.65.13.13}{13.6.5.18}\)

=\(\frac{5.65.13}{6.18}\)

=\(\frac{65.65}{108}\)

tự tính tiếp

\(\frac{121.75.130.169}{39.60.11.198} \)​= \(\frac{11^2.5^2.3.13.5.2.13^2}{3.13.2^2.3.5.11.2.3^2}\)

                                      = \(\frac{11.5^2.13^2}{2^2.3^3}\)

Mình ko hiểu cho lắm !!!*.*😕😦

\(24m=\frac{24}{1000}km=\frac{3}{125}km.\)

6 yến = \(\frac{6}{100}\)tấn = \(\frac{3}{50}\)tấn.

------------------------------------------------------------------------

\(\frac{1515}{1717}=\frac{1515\div101}{1717\div101}=\frac{15}{17}\)

24m = \(\frac{24}{1000}\)km = \(\frac{3}{125}\)km

6 yến = \(\frac{6}{100}\)tấn = \(\frac{3}{50}\)tấn

\(\frac{1515}{1717}\)= \(\frac{15}{17}\)

24m=24/1000km=3/125km

6 yến=6/100 tấn=3/50 tấn

1515/1717 = 15/17

\(\frac{27272727}{43434343}=\frac{27272727:1010101}{43434343:1010101}=\frac{27}{43}\)

\(\frac{27272727}{43434343}=\frac{27x1010101}{43x1010101}=\frac{27}{43}\)

27272727/43434343=1010101x27/1010101x43=27/43

chắc chắn 100% k cho mình nhata phuong anh

\(\frac{8\cdot3\cdot7}{12\cdot3\cdot14}\)=\(\frac{4\cdot2\cdot3\cdot7}{4\cdot3\cdot3\cdot7\cdot2}\)=\(\frac{1}{3}\)

Khi lớp 4 mình toàn làm vậy thôi. Phân tích ra thừa số giống nhau rồi rút gon cho nhanh.

\(\frac{8\times3\times7}{12\times3\times14}\) 

\(=\frac{2\times4\times3\times7}{3\times4\times3\times2\times7}\)

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

143/132=13/12

3535/3737=35/37

~HT~

K cho mình nha mình đang cần tăng SP CẢM ƠN MỌI NHƯỜI

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\(\frac{143}{132}=\frac{143:11}{132:11}=\frac{13}{12};\frac{3535}{3737}=\frac{3535:101}{3737:101}=\frac{35}{37}\)