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\(6=\frac{6}{1}=\frac{12}{2}=\frac{24}{4}=\frac{48}{8}=\frac{96}{16}\)
\(5:9=\frac{5}{9}=\frac{10}{18}=\frac{20}{36}=\frac{40}{72}=\frac{80}{144}\)
\(1=\frac{3}{3}=\frac{5}{5}=\frac{7}{7}=\frac{9}{9}=\frac{11}{11}\)
\(0=\frac{0}{7}=\frac{0}{10}=\frac{0}{13}=\frac{0}{16}=\frac{0}{19}\)
Chúc em hok tốt!!!
a) $\frac{{14}}{{18}}:\frac{8}{9} = \frac{7}{9}:\frac{8}{9} = \frac{7}{9} \times \frac{9}{8} = \frac{{63}}{{72}} = \frac{7}{8}$
b) $\frac{9}{6}:\frac{3}{{10}} = \frac{3}{2}:\frac{3}{{10}} = \frac{3}{2} \times \frac{{10}}{3} = \frac{{30}}{6} = 5$
c) $\frac{4}{5}:\frac{{10}}{{15}} = \frac{4}{5}:\frac{2}{3} = \frac{4}{5} \times \frac{3}{2} = \frac{{12}}{{10}} = \frac{6}{5}$
d) $\frac{1}{6}:\frac{{21}}{9} = \frac{1}{6}:\frac{7}{3} = \frac{1}{6} \times \frac{3}{7} = \frac{3}{{42}} = \frac{1}{{14}}$
- a B,b D
- a \(\frac{1}{2}\)b \(\frac{2}{5}\)
- \(\frac{2}{3};\frac{10}{17};\frac{5}{11};\frac{4}{9}\)
- a\(\frac{5}{12}\)b\(\frac{97}{36}\)
a, 4 = 12/3
b, 7 = 35/5
c, 0 = 0/7
d, 1 = 100/100
e, 11 = 88/8
HT và $$$
a) \(\frac{1}{2}+\frac{1}{4}< \frac{3}{4}+\frac{1}{5}\)
b) \(\frac{7}{13}+\frac{2}{9}>\frac{3}{26}+\frac{7}{13}\)
~ GHÉT ..............................~
a) \(\frac{1}{2}+\frac{1}{4}< \frac{3}{4}+\frac{1}{5}\)
b) \(\frac{7}{13}+\frac{2}{9}>\frac{3}{26}+\frac{7}{13}\)
`4/5` tạ `= 4/5 xx 100=80 kg`
`3/5` yến `=3/5 xx 10=6kg`
`4/5` tạ `+3/5` yến `=80+6=86kg`
`->D`
\(\dfrac{4}{5}\) tạ + \(\dfrac{3}{5}\) yến = \(80kg+6kg=86kg\)
\(\rightarrow\)Chọn D