\(\dfrac{121.75.130.169}{39.60.11.198}=\dfrac{11^2.3.5^2.2.5.13.13^2}{3.13.2^2.3.5.11.2.3^2.11}=\dfrac{2.3.5^3.11^2.13^3}{2^3.3^4.5.11^2.13}=\dfrac{5^2.13^2}{2^2.3^3}=\dfrac{4225}{108}\)

=\(\dfrac{121.75.130.169}{39.60.11.198}\)

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

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

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

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

=\(\dfrac{4225}{108}\)

Chúc bạn học tốt !

Ta có: \(\dfrac{121\cdot75\cdot130\cdot169}{39\cdot60\cdot11\cdot198}\)

\(=\dfrac{11^2\cdot15\cdot5\cdot13\cdot10\cdot13^2}{13\cdot3\cdot15\cdot4\cdot11\cdot11\cdot18}\)

\(=\dfrac{5\cdot13^2\cdot10}{3\cdot4\cdot18}=\dfrac{4225}{108}\)

=\(\frac{4225}{108}\)

bạn làm cách giải sẵn cho tớ

\(\frac{121.75.130.169}{39.60.11.198}\)=\(\frac{4225}{108}\)

mình nghĩ mình nên làm tắt vì đó là toán lớp 6 mà , nhỉ?  nhớ tk đúng mình nha, thanks , ai tk mình , mình tk lại nhưng nhớ phải gửi thư để mình tk cho nhé

Trả lời:

\(\frac{121.75.130.169}{39.60.11.198}=\frac{11.11.15.5.65.2.13.13}{13.3.15.4.11.99.2}=\frac{11.5.65.13}{3.4.99}=\frac{4225}{108}\)

hok tốt!!

^^

= 11×11×15×5×39×3×2×65

      39×15×2×2×11×3×6×11

= 5×65

    2×6

= 325

     12

Học tốt~♡

\(\frac{121\cdot75\cdot130\cdot169}{39\cdot60\cdot11\cdot198}=\frac{11^2\cdot3\cdot5^2\cdot13\cdot2\cdot5\cdot13^2}{13\cdot3\cdot2^2\cdot3\cdot5\cdot11\cdot2\cdot11\cdot3^2}\)

\(=\frac{11^2\cdot3\cdot5^3\cdot13^3\cdot2}{13\cdot3^4\cdot2^3\cdot5\cdot11^2}=\frac{13\cdot5^2}{3^3\cdot2^2}=\frac{325}{36}\)

P/S:Không bt có đúng ko nx nhưng hướng làm là như vậy

cảm ơn

\(\frac{121.75.130.169}{39.60.11.198}=\frac{11.11.3.25.10.13.13.13}{13.3.2.3.10.11.18.11}=\)\(\frac{25.169}{6.18}=\frac{4225}{108}\)

\(\left(1\right)\frac{121.75.130.169}{39.60.11.198}\)

\(=\frac{121.15.5.13.10.13.13}{13.3.15.4.11.18.11}\)

\(=\frac{121.5.13^2.10}{3.4.18.121}\)

\(=\frac{50.196}{12.18}\)

\(=\frac{9800}{216}=\frac{1225}{27}\)

\(\left(2\right)\frac{135.350+135.550}{900.100+35.900}\)

\(=\frac{135.\left(350+550\right)}{900.\left(100+35\right)}\)

\(=\frac{135.900}{900.135}=1\)

HOK TOT

1)=11^2.15.5.13.10.169/13.3.15.4.11.198

  =5.10.169/3.4.18

=8450/216=4225/108

2)=135.(350+550)/900.(100+35)

 =135.900/900.135=1

\(=\dfrac{121}{11}\cdot\dfrac{75}{60}\cdot\dfrac{169}{39}\cdot\dfrac{130}{198}=11\cdot\dfrac{5}{4}\cdot\dfrac{13}{3}\cdot\dfrac{65}{99}\)

\(=\dfrac{11}{99}\cdot\dfrac{65}{12}\cdot65=\dfrac{4225}{108}\)

\(A=\dfrac{121.75.130.169}{39.60.11.198}\)

\(A=\dfrac{9075.130.169}{2340.11.198}\)

\(A=\dfrac{1179750.169}{25740.198}\)

\(A=\dfrac{199377750}{5096520}\)

\(A=\dfrac{4225}{108}\)

Câu 1: \(\frac{121.75.130.169}{39.60.11.198}\)=\(\frac{11x11x15x5x130x13x13}{13x13x15x4x11x11x18}\)= \(\frac{5x130}{4x18}\)= \(\frac{650}{72}\)= \(\frac{325}{36}\)

Câu 2: \(\frac{1998.1990+3978}{1992.1991-3984}\)= \(\frac{3976020}{3962088}\)= \(\frac{994005}{990522}\)

câu 2 bạn giải kĩ hơn đi.khó hiểu

Hình như bạn At the speed of light làm sai rồi . 39: 13 = 3 mà chứ đâu phải bằng 13. Bạn chưa học chia bao giờ à !!¤♡☆😮