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Rút gọn phân số (-14).11+14.2/11.21-7.22
(-14).11+14.2/11.21-7.22
=-154+28/231-154
=-126/77
=-18/11
\(\dfrac{-14.11+14.2}{11.21-7.22}=\dfrac{14.-11+14.2}{11.21-14.11}=\dfrac{14\left(-11+2\right)}{11\left(21-14\right)}=\dfrac{14.-9}{11.7}=\dfrac{-126}{77}=\dfrac{-18}{11}\)
a \(\dfrac{-2}{5}\)
b -1
c \(\dfrac{2}{5}\)
d \(\dfrac{-18}{11}\)
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20/45 = 4/9
14/35 = 2/7
-32/44 = -8/11
Chúc bạn học tốt !!! :)))
Đáp án :
\(\frac{20}{45}=\frac{20:5}{45:5}=\frac{4}{9}\)
\(\frac{14}{35}=\frac{14:7}{35:7}=\frac{2}{5}\)
\(\frac{-32}{44}=\frac{-32:4}{44:4}=\frac{-8}{11}\)
Hok tốt
a, \(\frac{8.5-8.2}{16}\)\(=\frac{40-16}{16}=\frac{24}{16}=\frac{3}{2}\)
b, \(\frac{11.4-11}{2-13}=\frac{44-11}{-11}=\frac{33}{-11}=-3\)
Chúc em học tốt!
\(\frac{-72}{14}=\frac{-36}{7}\)
\(\frac{990}{2610}=\frac{11}{29}\)
\(\frac{374}{506}=\frac{17}{23}\)
\(\frac{3600-75}{8400-175}=\frac{3525}{8225}=\frac{3}{7}\)
hok tốt!!
\(\frac{7.25-49}{7.24+21}=\frac{7.25-7.7}{7.24+7.3}=\frac{7\left(25-7\right)}{7\left(24+3\right)}=\frac{25-7}{24+3}=\frac{18}{27}=\frac{2}{3}\)