15/22

               Tk cho Mk nhe

bằng 18/22

\(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{12}{15}+\frac{22}{33}+\frac{48}{64}\)

\(=\frac{11}{33}+\frac{16}{64}+\frac{3}{15}+\frac{12}{15}+\frac{22}{33}+\frac{48}{64}\)

\(=\left(\frac{11}{33}+\frac{22}{33}\right)+\left(\frac{16}{64}+\frac{48}{64}\right)+\left(\frac{3}{15}+\frac{12}{15}\right)\)

\(\frac{33}{33}+\frac{64}{64}+\frac{15}{15}\)

\(=1+1+1\)

\(=3\)

ket qua la 3 do

\(\frac{9}{22}\)và \(\frac{3}{11}\)

Ta có : \(\frac{3}{11}=\frac{6}{22}\)

\(\frac{9}{22}+\frac{6}{22}=\frac{15}{22}\)

Ủng hộ nhé ! 

quy đồng 3/11=6/22

6/22+9/22=15/22

đ/s:15/22

TA THẤY : \(\frac{13}{30}=\frac{39}{90},\frac{14}{30}=\frac{42}{90}\)

GIỮA \(\frac{39}{90},\frac{42}{90}\)CÓ \(\frac{40}{90},\frac{41}{90}\)

VÂY 2 PHÂN SÓ Ở GIỮA \(\frac{13}{30},\frac{14}{30}\)LÀ \(\frac{40}{90},\frac{41}{90}\)

 TA THẤY:\(\frac{22}{30}=\frac{66}{90},\frac{33}{30}=\frac{99}{90}\)

TỰ LÀM

a) <

b) =

c) >

d) <

e) <

\(\frac{2010}{2011}< \frac{2011}{2012}\)

\(\frac{11}{12}=\frac{22}{24}\)

\(\frac{25}{30}>\frac{25}{49}\)

\(\frac{1}{5}< \frac{3}{8}\)

\(\frac{1995}{1997}< \frac{1995}{1996}\)

\(\frac{9}{22}+\frac{3}{11}\)

\(=\frac{9}{22}+\frac{6}{22}\)

\(=\frac{15}{22}\)

Đáp số : \(\frac{15}{22}\)

15/22

Bài 1 :

\(\frac{22}{55}=\frac{22:11}{55:11}=\frac{2}{5}\)

\(\frac{63}{81}=\frac{63:9}{81:9}=\frac{7}{9}\)

Bài 2 :

\(\frac{3}{16}=\frac{3\times24\times56}{16\times24\times56}=\frac{4032}{21504}\)

\(\frac{5}{24}=\frac{5\times16\times56}{24\times16\times56}=\frac{4480}{21504}\)

\(\frac{21}{56}=\frac{21\times24\times16}{56\times24\times16}=\frac{8064}{21504}\)

Học tốt # ^-<

cảm ơn bạn đã giúp mình giải hai bài trên

a,\(\frac{5}{6}=\frac{10}{12}=\frac{15}{18}=\frac{20}{24}\)

b,\(\frac{7}{11}=\frac{14}{22}=\frac{21}{33}=\frac{56}{44}\)

học tốt

5/6=10/12=15/18=60/72

7/11=14/22=21/33=63/99

HOK TỐT