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18,34+(-18)x124=18,34+-2232
=2213,66
-36,17+9 x-52= -36,17+468
=431,83
\(\frac{77}{176}=\frac{77:11}{176:11}=\frac{7}{16}\) ; \(\frac{232323}{474747}=\frac{232323:10101}{474747:10101}=\frac{23}{47}\)
\(\frac{376376}{159159}=\frac{376376:1001}{159159:1001}=\frac{376}{159}\) ; \(\frac{9\cdot8\cdot5}{24\cdot15}=\frac{9\cdot8\cdot5}{8\cdot3\cdot3\cdot5}=\frac{9\cdot8\cdot5}{8\cdot9\cdot5}=1\)
\(\frac{9.8.5}{24.15}\)
\(=\frac{9.8.5}{8.3.3.5}\)
\(=1\)
\(P=\frac{3^9.3^{20}.3^8}{3^{24}.2^6.343}\)
\(\Leftrightarrow P=\frac{3^{37}}{3^{24}.2^6.3^5}\)
\(\Leftrightarrow P=\frac{3^{37}}{3^{29}.2^6}\)
\(\Leftrightarrow P=\frac{3^8}{2^6}\)
a, 24/-42 = -24/42= -4x6/7x6 =-4/7
b,-24/36 = -2x12/3x12 =-2/3
c,-8/56= -1x8/7x8 =-1/7
d,29/-87= -29/87 =-1x29/3x29 =-1/3
e, -3x35/42x9 =-1x3x5x7/6x7x3x3 =-1x5/3x6 =-5/18
f,-45045 / 6006000=-45x1001 /6000x1001=45/6000=3x15/15x400=3/400
\(a.\frac{-4}{7},b.\frac{-2}{3},c.\frac{-1}{7},d.\frac{-1}{3},e.\frac{-5}{18},f.\frac{-3}{400}\)
lời giải nè:
= 39+20.28/324.243.26
=329.28/324.27.9.26
=329.28/324.3332.26
=1.22/1.1.1.1
=4
\(\dfrac{-8}{24}=\dfrac{-8:8}{24:8}=\dfrac{-1}{3}\)
\(\dfrac{-124}{-100}=\dfrac{124}{100}=\dfrac{124:4}{100:4}=\dfrac{31}{25}\)