Toán Lớp 6: -5/4+19/12+-10/3
-19/6+15/2+11/3
-2/5+1/6+-1/5
-3/4+9/7+-1/4+5/7
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Toán Lớp 6: -5/4+19/12+-10/3
-19/6+15/2+11/3
-2/5+1/6+-1/5
-3/4+9/7+-1/4+5/7
Comments ( 2 )
$\dfrac{-5}{4}+\dfrac{19}{12}+\dfrac{-10}{3}$
$=-\dfrac{15}{12}+\dfrac{19}{12}-\dfrac{40}{12}$
$=\dfrac{-15+19-40}{12}$
$=\dfrac{-36}{12}$
$=-3$
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$\dfrac{-19}{6}+\dfrac{15}{2}+\dfrac{11}{3}$
$=-\dfrac{19}{6}+\dfrac{45}{6}+\dfrac{22}{6}$
$=\dfrac{-19+45+22}{6}$
$=\dfrac{48}{6}$
$=8$
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$\dfrac{-2}{5}+\dfrac{1}{6}+\dfrac{-1}{5}$
$=\dfrac{-3}{5}+\dfrac{1}{6}$ $=\dfrac{-18}{30}+\dfrac{5}{30}$
$=\dfrac{-18+5}{30}$ $=\dfrac{-13}{30}$
$=-\dfrac{13}{30}$
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$\dfrac{-3}{4}+\dfrac{9}{7}+\dfrac{-1}{4}+\dfrac{5}{7}$
$=\dfrac{-4}{4}+\dfrac{9}{7}+\dfrac{5}{7}$
$=\dfrac{-4}{4}+\dfrac{14}{7}$
$=-1+\dfrac{14}{7}$
$=-1+2$
$=1$
Mong cho lời giải hay nhất ❤️⭐️
