Question

Решите примеры пж:

3 -2/5×3 1/3=
-3÷5 1/4-2 1/2÷7/8=
7/8×2 2/3+(-5/6)÷2 1/7=
1/5-(1 1/2-1 2/7×7/18)=

Answer 1

$= frac{18-135+80}{90}=- frac{37}{90}$$a) 3- frac{2}{5}* frac{10}{3} =3- frac{2*2}{3} =3-1 frac{1}{3}=1 frac{2}{3} \ b)-3: frac{21}{4}- frac{5}{2}: frac{7}{8} =-3* frac{4}{21} - frac{5}{2} * frac{8}{7} =- frac{4}{7} - frac{20}{7}= -frac{24}{7} =-3 frac{3}{7} \ c) frac{7}{8}* frac{8}{3}- frac{5}{6} * frac{7}{15} = frac{7}{3}- frac{7}{18}= frac{7*6-7}{18} = frac{35}{18} = 1frac{17}{18} \ d) frac{1}{5} - frac{3}{2}+ frac{16}{7}* frac{7}{18}= frac{1*18}{90} - frac{3*45}{90} + frac{8*10}{9*10}=$

Answer 2

1)3-2/5* 3*1/3=2,6
2)-3÷5*1/4-2*1/2÷7/8=
-0,167...
3)=1,107...
4)= -0,188...