6/8 = 3/4 ; 39/65 = 3/5 ; 70/42 = 5/3 ; 84/231 = 4/11 ; 117117/504504 = 13/56 ; 7/35 = 1/5 ; 112/140 = 4/5 ; 165/110 = 3/2 ; 30/105 = 2/7 ; 153153/414414 = 17/46

6/8=3/4

\(\dfrac{117117}{504504}\text{=}\dfrac{117117:9009}{504504:9009}\text{=}\dfrac{13}{56}\)

\(\dfrac{153153}{414414}\text{=}\dfrac{153153:9009}{414414:9009}\text{=}\dfrac{17}{46}\)

\(a,\dfrac{52}{32}=\dfrac{13}{8}\\ \dfrac{55}{65}=\dfrac{11}{13}\\ MSC:104\\ =>\dfrac{13}{8}=\dfrac{13.13}{8.13}=\dfrac{169}{104}\\ \dfrac{11}{13}=\dfrac{11.8}{13.8}=\dfrac{88}{104}\)

\(b,\dfrac{72}{64}=\dfrac{9}{8}\\ \dfrac{54}{81}=\dfrac{2}{3}\\ MSC:24\\ \dfrac{9}{8}=\dfrac{9.3}{8.3}=\dfrac{27}{24}\\ \dfrac{2}{3}=\dfrac{2.8}{3.8}=\dfrac{16}{24}\\ c,\dfrac{24}{36}=\dfrac{2}{3}\\ \dfrac{12}{30}=\dfrac{2}{5}\\ MSC:15\\ \dfrac{2}{3}=\dfrac{2.5}{3.5}=\dfrac{10}{15}\\ \dfrac{2}{5}=\dfrac{2.3}{3.5}=\dfrac{6}{15}\)

\(d,\dfrac{80}{40}=2\\ \dfrac{45}{63}=\dfrac{5}{7}\\ MSC:7\\ 2=\dfrac{14}{7}\\ e,\dfrac{150}{50}=3\\ \dfrac{100}{200}=\dfrac{1}{2}\\ MSC:2\\ 3=\dfrac{6}{2}\\ f,\dfrac{54}{81}=\dfrac{2}{3}\\ \dfrac{69}{93}=\dfrac{23}{21}\\ MSC:21\\ \dfrac{2}{3}=\dfrac{2.7}{3.7}=\dfrac{14}{21}\)

\(a.\dfrac{52}{32}\text{=}\dfrac{13}{8};\dfrac{55}{65}\text{=}\dfrac{11}{13}\)

\(\dfrac{13.13}{13.8}\text{=}\dfrac{169}{104};\dfrac{11.8}{13.8}\text{=}\dfrac{88}{104}\)

\(c.\dfrac{24}{36}\text{=}\dfrac{2}{3};\dfrac{12}{30}\text{=}\dfrac{2}{5}\)

\(\dfrac{2.5}{3.5}\text{=}\dfrac{10}{15};\dfrac{2.3}{5.3}\text{=}\dfrac{6}{15}\)

\(b.\dfrac{72}{64}\text{=}\dfrac{9.3}{8.3}\text{=}\dfrac{27}{24};\dfrac{54}{81}\text{=}\dfrac{2.8}{3.8}\text{=}\dfrac{16}{24}\)

\(d.\dfrac{80}{40}\text{=}\dfrac{2.63}{63}\text{=}\dfrac{126}{63};\dfrac{45}{63}\)

\(e.\dfrac{150}{50}\text{=}\dfrac{3.2}{2}\text{=}\dfrac{6}{2};\dfrac{100}{200}\text{=}\dfrac{1}{2}\)

\(f.\dfrac{54}{81}\text{=}\dfrac{2.31}{3.31}\text{=}\dfrac{62}{93};\dfrac{69}{93}\)

\(\frac{135135}{504504}=\frac{135135:9009}{504504:9009}=\frac{15}{56}\)

\(\frac{136136}{368368}=\frac{136136:8008}{368368:8008}=\frac{17}{46}\)

Hướng dẫn giải:

\(\dfrac{4}{100}=\dfrac{1}{25}\\ \dfrac{81}{54}=\dfrac{3}{2}\)

a.135/504

b.136/368

a là 15/56

b là 17/46

rút gọn các phân số 

a     135135/504504 = 135/504

b      136136/368368 = 136/368 

#hien#

\(a,\frac{45}{60}=\frac{45:15}{60:15}=\frac{3}{4}\)

\(b,\frac{39}{12}=\frac{39:3}{12:3}=\frac{13}{4}\)

\(c,\frac{81}{90}=\frac{81:9}{90:9}=\frac{9}{10}\)

\(d,\frac{360}{720}=\frac{360:360}{720:360}=\frac{1}{2}\)

\(e,\frac{24}{20}=\frac{24:4}{20:4}=\frac{6}{5}\)

\(g,\frac{66}{65}=\frac{66}{65}\)

\(...,\frac{66}{55}=\frac{66:11}{55:11}=\frac{6}{5}\)

a) 45/60 = 3/4

b)  39/12 = 13/4

c) 81/90 = 9/10

d) 360/720 = 1/2

e) 24/20 = 6/5

g) 66/65 = 66/65

h) 66/55 = 6/5

mik nha !~

\(\frac{81}{54}\)=\(\frac{81:27}{54:27}\)=\(\frac{3}{2}\)

HT

81/54=81:27/54:27=3/2 nha

HT

k cho mình nha

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