Question

ALGUEM ME AJUDA JA PEDI AJUDA 3 VEZES E NINGUEM ME AJUDOU ;(

Answer 1

Explicação passo-a-passo:

$a) \frac{1}{3} \times \frac{1}{5} = \frac{1}{15} \\ \\ b) \frac{1}{3} \times \frac{3}{5} = \frac{3 : 3}{15 :3 } = \frac{1}{5} \\ \\ c) \frac{2}{3} \times \frac{1}{3} = \frac{2}{9} \\ \\ d) \frac{2}{9} \times \frac{2}{1} = \frac{4}{9} \\ \\ e) \frac{4}{3} \times \frac{3}{1} = \frac{12}{3} = 4 \\ \\ f) \frac{8}{6} \times \frac{5}{1} = \frac{40 :2 }{6 :2 } = \frac{20}{3} \\ \\ g) \frac{7}{5} \times \frac{5}{7} = \frac{35}{35} = 1 \\ \\ h) \frac{4}{9 } \times \frac{3}{7} = \frac{12 : 3}{63 : 3} = \frac{4}{21} \\ \\ i) \frac{4}{15} \times \frac{3}{8} = \frac{12 :3 }{120 :3 } \\ \\ \: \: \frac{4 : 2}{60 :2 } = \frac{2 : 2}{30 : 2} = \frac{1}{15} \\ \\ j) \frac{1}{5} \times \frac{2}{6} \times \frac{3}{7} = \frac{2}{30} \times \frac{3}{7} \\ \\ \: \: \: \: \frac{6 :3 }{210 :3 } = \frac{2 : 2}{70 :2 } = \frac{1}{35}$

espero ter ajudado ♡