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a. \(\dfrac{8,5-8,2}{16}=\dfrac{0,3}{16}=\dfrac{3}{160}\)
b. \(\dfrac{2\cdot14}{7\cdot8}=\dfrac{1\cdot2}{1\cdot4}=\dfrac{2}{4}=\dfrac{1}{2}\)
c. \(\dfrac{11\cdot4-11}{2-13}=\dfrac{11\left(4-1\right)}{-11}=\dfrac{1\cdot3}{-1}=-3\)
d. \(\dfrac{49+7\cdot49}{49}=\dfrac{49\cdot\left(1+7\right)}{49}=\dfrac{8}{1}=8\)
\(\frac{17.5-17}{3-20}=\frac{17\left(5-1\right)}{-17}\frac{17.4}{-17}=\frac{4}{-1}=-4\)
\(y=\frac{49+7.49}{49}=\frac{49.\left(7+1\right)}{49}=\frac{49.8}{49}=8\)
a, \(\frac{7.25-49}{7.24+21}\)
\(=\frac{7.25-7.7}{7.24+7.3}=\frac{7\left(25-7\right)}{7\left(24+3\right)}=\frac{18}{27}=\frac{2}{3}\)
b, \(\frac{2.\left(-13\right).9.10}{\left(-3\right).4.\left(-5\right).26}=\frac{2.\left(-13\right).\left(-3\right).\left(-3\right).\left(-5\right).\left(-2\right)}{\left(-3\right).2.2.\left(-5\right).\left(-13\right).\left(-2\right)}\)
\(=\frac{-3}{2}\)
DỄ LẮM !
a) \(\frac{7\cdot25-49}{7\cdot24+21}=\frac{7\cdot25-7\cdot7}{7\cdot24+7\cdot3}=\frac{7\left(25-7\right)}{7\left(24+3\right)}\)
=\(\frac{18}{27}=\frac{2}{3}\)
b) \(\frac{2\cdot\left(-13\right)\cdot9\cdot10}{\left(-3\right)\cdot4\cdot\left(-5\right)\cdot26}=\frac{-1\cdot2\cdot13\cdot3\cdot3\cdot5\cdot2}{1\cdot3\cdot2\cdot2\cdot5\cdot13\cdot2}=-\frac{3}{2}\)
Chúc bn học tốt !
a) \(\frac{25}{1188}\)
b)\(\frac{4}{3}\)
c)\(\frac{17\times4}{-17}=\frac{4}{-1}=\frac{-4}{1}=-4\)
a.\(\frac{17.5-17}{-17}=\frac{17.4}{-17}=-4\)
b.\(\frac{49.8}{49}=8\)
a) \(\frac{17.5-17}{3-20}\)= \(\frac{85-17}{3-20}\)= \(\frac{68}{-17}\)=-4
b) \(\frac{49+7.49}{49}\)= \(\frac{49+343}{49}\)= \(\frac{392}{49}\)= 8
CHÚC BẠN HỌC TỐT