Question

a) 1 intreg şi 7 pe 8×9 pe 9:8 intregi si 1 pe 3 b) 3 întreg si 3 pe 8 : la 1 intregi si 1 pe 4: la 3 pe 5​

Answer 1

Răspuns:

$1\frac{7}{8} *\frac{9}{9} :8\frac{1}{3} =\frac{1*8+7}{8} *1:\frac{8*3+1}{3} =\frac{15}{8} :\frac{25}{3} =\frac{15}{8} *\frac{3}{25} =\frac{9}{40} \\\\3\frac{3}{8} :1\frac{1}{4} :\frac{3}{5} =\frac{27}{8} :\frac{5}{4} :\frac{3}{5} =\frac{27}{8} *\frac{4}{5} *\frac{5}{3} =\frac{540}{120} =\frac{9}{2}$

Answer 2

$\bold{a)} \ 1\frac{7}{8}\cdot \frac{9}{9}:8\frac{1}{3}=\frac{15}{8}:\frac{25}{3}=\frac{15}{8}\cdot \frac{3}{25}=\boxed{\frac{9}{40}}; \\\\ \bold{b)} \ 3\frac{3}{8}:1\frac{1}{4}:\frac{3}{5}=\frac{27}{8}\cdot\frac{4}{5}\cdot \frac{5}{3}=\boxed{\frac{9}{2}};$