Hơi nhiều nhưng mn ráng lm nhé tối gủi cũng đc
a, 15/45 + 25/30=7/6
b, 28/32 + 45/27=61/24
c, 4/8 + 8/24=5/6
d, 8/28 + 5/30=19/42
e, 12/10 - 20/50=4/5
f, 8/24 - 5/25=2/15
g, 12/20 - 6/18=4/15
h, 10/12 - 12/36=1/2
Không giải chi tiết à :))
a. \(\dfrac{7}{6}\)
b. \(\dfrac{61}{24}\)
c. \(\dfrac{5}{6}\)
d. \(\dfrac{19}{42}\)
e. \(\dfrac{4}{5}\)
f. \(\dfrac{2}{15}\)
g. \(\dfrac{4}{15}\)
h. \(\dfrac{1}{2}\)
\(a,\dfrac{15}{45}+\dfrac{25}{30}=\dfrac{1}{3}+\dfrac{5}{6}=\dfrac{2}{6}+\dfrac{5}{6}=\dfrac{7}{6}\)
\(b,\dfrac{28}{32}+\dfrac{45}{27}=\dfrac{7}{8}+\dfrac{5}{3}=\dfrac{21}{24}+\dfrac{40}{24}=\dfrac{61}{24}\)
\(c,\dfrac{4}{8}+\dfrac{8}{24}=\dfrac{1}{2}+\dfrac{1}{3}=\dfrac{3}{6}+\dfrac{2}{6}=\dfrac{5}{6}\)
\(d,\dfrac{8}{28}+\dfrac{5}{30}=\dfrac{2}{7}+\dfrac{1}{6}=\dfrac{12}{42}+\dfrac{7}{42}=\dfrac{19}{42}\)
\(e,\dfrac{12}{10}-\dfrac{20}{50}=\dfrac{6}{5}-\dfrac{2}{5}=\dfrac{4}{5}\)
\(f,\dfrac{8}{24}-\dfrac{5}{25}=\dfrac{1}{3}-\dfrac{1}{5}=\dfrac{5}{15}-\dfrac{3}{15}=\dfrac{2}{15}\)
\(g,\dfrac{12}{20}-\dfrac{6}{18}=\dfrac{3}{5}-\dfrac{1}{3}=\dfrac{9}{15}-\dfrac{5}{15}=\dfrac{4}{15}\)
\(h,\dfrac{10}{12}-\dfrac{12}{36}=\dfrac{5}{6}-\dfrac{1}{3}=\dfrac{5}{6}-\dfrac{2}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)
