Question

Решить, ! 1/3+0,6=? 0,8-4/15=? 7 5/12+4 3/8=? 3 11/20+2 19/30=? 3 3/10-1 7/15=? 1 3/4+1,25=? 21/20-0,2=? 1/3+0,15= 6 3/8-2 5/8=? 5 2/13-4 5/13=? 0,8-2/3=? 1 7/10-4/5=? 2 3/4+9 5/6=?

Answer 1

Пошаговое объяснение:

$\frac{1}{3} + 0.6 = \frac{1}{3} + \frac{3}{5} = \frac{5 + 9}{15} = \frac{14}{15} \\ \\ 0.8 - \frac{4}{15} = \frac{4}{5} - \frac{4}{15} = \frac{12 - 4}{15} = \frac{8}{15} \\ \\ 7 \frac{5}{12} + 4 \frac{3}{8} = 11 \frac{5 \times 2 + 3 \times 3}{24} = 11 \frac{19}{24}$

$3 \frac{11}{20} + 2 \frac{19}{30} = 5 \frac{11 \times 3 + 19 \times 2}{60} = 5 \frac{33 + 38}{60} = 5 \frac{71}{60} = 5 + 1 \frac{11}{60} = 6 \frac{11}{60} \\ \\ 3 \frac{3}{10} - 1 \frac{7}{15} = 2 \frac{9 - 14}{30} = 2 - \frac{5}{30} = 2 - \frac{1}{6} = 1 \frac{6 - 1}{6} = 1 \frac{5}{6}$

$1 \frac{3}{4} + 1.25 = 1.75 + 1.25 = 3 \: \: \: \: ili \\ \\ 1 \frac{3}{4} + 1.25 = 1 \frac{3}{4} + 1 \frac{1}{4} = 2 \frac{3 + 1}{4} = 2 \frac{4}{4} = 2 + 1 = 3$

$\frac{21}{20} -0.2 = \frac{21}{20} - \frac{2}{10} = \frac{21 - 4}{20} = \frac{17}{20} \\ \\ \frac{1}{3} + 0.15 = \frac{1}{3} + \frac{3}{20} = \frac{20 + 9}{60} = \frac{29}{60}$

$6 \frac{3}{8} - 2 \frac{5}{8} = 4 \frac{3 - 5}{8} = 4 - \frac{2}{8} = 3 \frac{8 - 2}{8} = 3 \frac{6}{8} = 3 \frac{3}{4} = 3.75 \\ \\$

$5 \frac{2}{13} - 4 \frac{5}{13} = 1 \frac{2 - 5}{13} = 1 - \frac{3}{13} = \frac{13 - 3}{13} = \frac{10}{13} \\ \\ 0.8 - \frac{2}{3} = \frac{4}{5} - \frac{2}{3} = \frac{12 - 10}{15} = \frac{2}{15}$

$1 \frac{7}{10} - \frac{4}{5} = 1 \frac{7 - 8}{10} = 1 - \frac{1}{10} = \frac{10 - 1}{10} = \frac{9}{10} = 0.9 \\$

$2 \frac{3}{4} + 9 \frac{5}{6} = 11 \frac{9 + 10}{12} = 11 \frac{19}{12} = 11 + 1 \frac{7}{12} = 12 \frac{7}{12} \\$