Question

Rút gọn:

a) ; b) c) ;

d) ; e) .

@Bùi Thị Vân

Answer 1

a) .

b)

c)

d)

e)

.

 

Answer 2

a) \(\frac{3\cdot5}{8\cdot24}=\frac{5}{8\cdot8}=\frac{5}{64}\)

b) \(\frac{2\cdot14}{7\cdot8}=\frac{14}{7\cdot4}=\frac{2}{4}=\frac{1}{2}\)

c) \(\frac{3\cdot7\cdot11}{22\cdot9}=\frac{7}{2\cdot3}=\frac{7}{6}\)

d) \(\frac{8\cdot5-8\cdot2}{16}=\frac{8\cdot3}{16}=\frac{24}{16}=\frac{3}{2}\)

e) \(\frac{11\cdot4-11}{2-13}=\frac{11\cdot3}{2-13}=\frac{33}{-11}=-3\)

Answer 3

a ) \(\frac{3.5}{8.24}\) = \(\frac{15}{192}\) = \(\frac{15:3}{192:3}\) \(\frac{5}{64}\)

b ) \(\frac{2.14}{7.8}\) = \(\frac{28}{56}\) = \(\frac{28:28}{56:28}\) = \(\frac{1}{2}\)

c ) \(\frac{3.7.11}{22.9}\) = \(\frac{231}{198}\) = \(\frac{231:11}{198:11}\) = \(\frac{21}{18}\) = \(\frac{7}{6}\)

d ) \(\frac{8.5-8.2}{16}\) = \(\frac{8.\left(5-2\right)}{16}\) = \(\frac{24}{16}\) = \(\frac{24:8}{16:8}\) = \(\frac{3}{2}\)

e ) \(\frac{11.4-11}{2-13}\) = \(\frac{11.\left(4-1\right)}{2-13}\) = \(\frac{11.3}{2-13}\) = \(\frac{33}{-11}\) = -3