Question

выполните действия а)8•3/17 б)5/71•43 с)3/8•48 д)140•11/70 е)4•5/7 •31 f)9/37•2•13

Answer 1

$8 \times \frac{3}{17} = \frac{8}{1} \times \frac{3}{17} = \frac{8 \times 3}{1 \times 17} = \frac{24}{17} = 1 \frac{7}{17}$

$\frac{5}{71} \times 43 = \frac{5}{71} \times \frac{43}{1} = \frac{5 \times 43}{71 \times 1} = \frac{215}{71} = 3 \frac{2}{71}$

$\frac{3}{8} \times 48 = 18$

$140 \times \frac{11}{70} = 22$

$4 \times \frac{5}{7} \times 31 = \frac{4}{1} \times \frac{5}{7} \times \frac{31}{1} = \frac{4 \times 5 \times 31}{1 \times 7 \times 1} = \frac{620}{7} = 88 \frac{4}{7}$

$\frac{9}{37} \times 2 \times 13 = \frac{9}{37} \times \frac{2}{1} \times \frac{13}{1} = \frac{9 \times 2 \times 13}{37 \times 1 \times 1} = \frac{234}{37} = 6 \frac{12}{37}$

Відповідь: а) 1 7/17; б) 3 2/71; с) 18; д) 22; е) 88 4/7; f) 6 12/37.

Надеюсь помогла