Question

Найдите значение выражения 1) 1/2+6 3/7,2)6+4 9/11, 3) 2/9+1 8/15, 4)1/14+9 3/7, 5)7 1/12+6, 6) 5/7+3 1/4, 1) 7-5 1/4, 2)6-5 2/3, 3)12-9 3/8 4)11-6 2/3, 5)8-3 2/7, 6)5 6/13-2, 7) 9 3/10-4, 8) 2 3/14-1.

Answer 1

$\frac{1}{2} + 6 \frac{3}{7} = \frac{7}{14} + 6 \frac{6}{14} = 6 \frac{13}{14} \\ \\ 6 + 4 \frac{9}{11} = (6+4) + \frac{9}{11} =10 \frac{9}{11} \\ \\ \frac{2}{9} +1 \frac{8}{15} = \frac{10}{45} +1 \frac{24}{45} =1 \frac{34}{45} \\ \\ \frac{1}{14} +9 \frac{3}{7} = \frac{1}{14} +9 \frac{6}{14} =9 \frac{7}{14} =9 \frac{1}{2} \\ \\ 7 \frac{1}{12} + 6 = 13 \frac{1}{12} \\ \\ \frac{5}{7} + 3 \frac{1}{4} = \frac{20}{28} +3 \frac{7}{28} =3 \frac{27}{28} \\ \\$

$7 - 5 \frac{1}{4} = (6 +\frac{4}{4}) - (5 +\frac{1}{4}) = (6-5) + \frac{4-1}{4} =1 \frac{3}{4} \\ \\ 6 - 5 \frac{2}{3} = \frac{1}{3} \\ \\ 12 - 9 \frac{3}{8} =2 \frac{5}{8} \\ \\ 11 - 6 \frac{2}{3} = 4 \frac{1}{3} \\ \\ 8 - 3 \frac{2}{7} = 4 \frac{5}{7} \\ \\ 5 \frac{6}{13} - 2 = (5-2) + \frac{6}{13} =3 \frac{6}{13} \\ \\ 9 \frac{3}{10} - 4= 5 \frac{3}{10} \\ \\ 2 \frac{3}{14} -1 = 1 \frac{3}{14}$