Question

Выполните Действия: а) 3+8 5/12    б)10 6/7-3 в)4 2/13+ 5 7/13    г) 8 7/12 - 4 2/12 д) 4 8/11+5 7/11 е) 7 5/9- 2 8/9 ж) 7- 3/8 з) 10- 3 7/15

Answer 1

Ответ:

Пошаговое объяснение:

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$4\frac{2}{13} +5\frac{7}{13} =\frac{54}{13} +\frac{72}{13} =\frac{126}{13} =9\frac{9}{13}$

$8\frac{7}{12} -4\frac{2}{12} =\frac{103}{12} -\frac{50}{12} =\frac{53}{12} =4\frac{5}{12}$

$4\frac{8}{11} +5\frac{7}{11} =\frac{52}{11} +\frac{62}{11} =\frac{114}{11} =10\frac{4}{11}$

$7\frac{5}{9} -2\frac{8}{9} =\frac{68}{9} -\frac{26}{9} =\frac{42}{9} =4\frac{6}{9}$

$7-\frac{3}{8} =\frac{56}{8} -\frac{3}{8} =\frac{53}{8} =6\frac{5}{8}$

$10-3\frac{7}{15} =\frac{150}{15} -\frac{52}{15} =\frac{98}{15} =6\frac{8}{15}$

Answer 2

а) 3 + 8 5/12 = 3 + (8 + 5/12) = 3 + 8 + 5/12 = 11 5/12

б) 10 6/7 - 3 = (10 + 6/7) - 3 = 10 - 3 + 6/7 = 7 + 6/7 = 7 6/7

в) 4 2/13 + 5 7/13 = (4 + 5) + (2/13 + 7/13) = 9 + 9/13 = 9 9/13

г) 8 7/12 - 4 2/12 = (8 - 4) + (7/12 - 2/12) = 4 + 5/12 = 4 5/12

д) 4 8/11 + 5 7/11 = (4 + 5) + (8/11 + 7/11) = 9 + 15/11 = 9 15/11

е) 7 5/9 - 2 8/9 = (7 - 2) + (5/9 - 8/9) = 5 - 3/9 = 5 - 1/3 = 4 2/3

ж) 7 - 3/8 = 7 - 3/8 = 56/8 - 3/8 = 53/8

з) 10 - 3 7/15 = 10 - (3 + 7/15) = 10 - 3 - 7/15 = 7 - 7/15 = 7 8/15