Question

Вычислите:а)3 1/5×3 1/8;б)1 4/11:1 2/13;в)2 3/4:1 3/8×3 2/7.

Answer 1

а)3 1/5×3 1/8;=16/5*25/8=10
б)1 4/11:1 2/13=15/11*13/15=13/11=1 2/11
в)2 3/4:1 3/8×3 2/7=
11/4*8/11*23/7=46/7=6 4/7

Answer 2

$a)3 frac{1}{5} times 3 frac{1}{8} = frac{16}{5} times frac{25}{8} = 2 times 5 \ = 10$
б)
$1 frac{4}{11} div 1 frac{2}{13} = frac{15}{11} times frac{13}{15} = frac{13}{11 } = 1 frac{2}{11}$
в)
$2 frac{3}{4} div 1 frac{3}{8} times 3 frac{2}{7} = 6 frac{4}{7}$
$2 frac{3}{4} div 1 frac{3}{8} = frac{11}{4} times frac{8}{11} = 2$
$2 times 3 frac{2}{7} = 2 times frac{23}{7} = frac{46}{7} = 6 frac{4}{7}$