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2/7 / 1/7 = 10/28 = 5/14
3/8 / 9/4 = 12/72 = 2/12
8/21 / 4/7 = 56/84 = 14/21
5/8 / 15 / 8 = 1/24 / 8 = 1/192
\(a,\frac{2}{7}:\frac{4}{5}=\frac{2}{7}\times\frac{5}{4}=\frac{10}{28}=\frac{5}{14}\)
\(b,\frac{3}{8}:\frac{9}{4}=\frac{3}{8}\times\frac{4}{9}=\frac{12}{72}=\frac{1}{6}\)
\(c,\frac{8}{21}:\frac{4}{7}=\frac{8}{21}\times\frac{7}{4}=\frac{56}{84}=\frac{2}{3}\)
\(d,\frac{5}{8}:\frac{15}{8}=\frac{5}{8}\times\frac{8}{15}=\frac{40}{120}=\frac{1}{3}\)
A,\(\frac{2}{7}:\frac{4}{5}=\frac{2}{7}\times\frac{5}{4}=\frac{10}{28}=\frac{5}{14}\)
B,\(\frac{3}{8}:\frac{9}{4}=\frac{3}{8}\times\frac{4}{9}=\frac{12}{72}=\frac{1}{6}\)
C.\(\frac{8}{21}:\frac{4}{7}=\frac{8}{21}\times\frac{7}{4}=\frac{56}{84}=\frac{2}{3}\)
D.\(\frac{5}{8}:\frac{15}{8}=\frac{5}{8}\times\frac{8}{15}=\frac{40}{120}=\frac{1}{3}\)
Đúng 100%
a) 7/6 + 4/16 = 7/6 + 1/4 = 14/12 + 3/12 = 17/12
b) 2/12 + 15/6 = 1/6 + 15/6 = 16/6 = 8/3
c) 5/7 - 2/6 = 5/7 - 1/3 = 15/21 - 7/21 = 8/21
Chúc bạn học tốt.
😁😁😁
4/16=1/4
7/6+1/4=6/24+28/24=34/34=12/17
2/12=1/6
1/6+15/6=6/36+90/36=96/36=24/9
2/6=1/3
5/7-1/3=15/21-7/21=8/21
rút gọn phân số :
4/5+21/15=4/5+7/5=11/5
8/9-25/45=8/9-5/9=3/9
tính :
5/6+2/7+15/6=5/6+15/6+2/7
=10/3+2/7=76/21
7/8-9/6.7/8=7/8-21/16=-7/16
chúc bạn học tốt !!!
\(\frac{1}{4}+\frac{3}{5}=\frac{17}{20}\)
\(\frac{5}{2}+\frac{7}{9}=\frac{59}{18}\)
\(\frac{3}{2}+\frac{2}{3}=\frac{13}{6}\)
\(\frac{4}{5}+\frac{3}{2}=\frac{23}{10}\)
\(\frac{4}{5}+\frac{3}{15}=\frac{4}{5}+\frac{1}{5}=1\)
\(\frac{2}{3}+\frac{32}{24}=\frac{2}{3}+\frac{4}{3}=2\)
\(\frac{5}{6}+\frac{15}{18}=\frac{5}{6}+\frac{5}{6}=\frac{10}{6}=\frac{5}{3}\)
\(\frac{8}{15}+\frac{2}{3}=\frac{8}{15}+\frac{10}{15}=\frac{18}{15}=\frac{6}{5}\)
\(\frac{3}{7}+\frac{4}{8}=\frac{24}{56}+\frac{28}{56}=\frac{52}{56}=\frac{13}{14}\)
_HT_
a)2/3x4/7=8/21
b)8/21:2/3=8/21x3/2=24/42=4/7
c)8/21:4/7=8/21x7/4=56/85=7//12
d)4/7X2/3=8/21
\(a,\frac{8}{15}+\frac{2}{3}=\frac{8+10}{15}=\frac{18}{15}=\frac{6}{5}\)
\(b,\frac{3}{7}+\frac{4}{8}=\frac{24+28}{56}=\frac{62}{56}=\frac{31}{28}\)
a) \(\frac{8}{15}+\frac{2}{3}=\frac{8}{15}+\frac{10}{15}=\frac{8+10}{15}=\frac{18}{15}=\frac{6}{5}\)
b) \(\frac{3}{7}+\frac{4}{8}=\frac{24}{56}+\frac{28}{56}=\frac{24+28}{56}=\frac{52}{56}=\frac{13}{14}\)
a)8/18=4/9
4/9+5/4=16/36+45/36=61/36
b)8/24=1/3
12/28=3/7
1/3+3/7=7/21+9/21=16/21
8/7+10/21=24/21+10/21=34/21
a)=8/18+5/4=4/9+5/4=61/36
b)=8/24+12/28=1/3+3/7=16/21
8/7+10/21=34/21
\(\frac{35}{40}=\frac{35\div5}{40\div5}=\frac{7}{8}\)
/HT\
