Question

Resolva e simplifique quando possivel

A) 3/8×7/5=
B) 7/12×8/21=
C) 16/15×10/18=
D) 13/27:4/9=
E) 24/18:22/6=
F) 32/25:12/30

Answer 1

$a) \frac{3}{8} \times \frac{7}{5} = \frac{3 \times 7}{8 \times 5} = \frac{21}{40} \\ b) \frac{7}{12} \times \frac{8}{21} = \frac{1}{3} \times \frac{2}{3} = \frac{2}{9} \\ c) \frac{16}{15} \times \frac{10}{18} = \frac{16}{3} \times \frac{1}{9} = \frac{16}{27} \\ d) \frac{13}{27} \div \frac{4}{9} = \frac{13}{27} \times \frac{9}{4} = \frac{13}{3} \times \frac{1}{4} = \frac{13}{12} \\ e) \frac{24}{18} \div \frac{22}{6} = \frac{24}{18} \times \frac{6}{22} = 4 \times \frac{1}{11} = \frac{4}{11} \\ f) \frac{32}{25} \div \frac{12}{30} = \frac{32}{25} \times \frac{30}{12} = \frac{32}{25} \times \frac{5}{2} = \frac{16}{5}$

Espero ter ajudado :)