Question

1 а) 3 1/8-2-4/5
б) 4-(2 3/4+1/5)

2. а)1-23/30
б)2 5/6+3 7/12
в)7 6/7+2 3/14

Answer 1

Пошаговое объяснение:

1) а)

$3 \frac{1}{8} - 2 - \frac{4}{5} = \frac{25}{8} - 2 - \frac{4}{5} = \frac{13}{40} = 0.325$

б)

$4 - (2 \frac{3}{4} + \frac{1}{5} ) = 4 - ( \frac{11}{4} + \frac{1}{5} ) = 4 - \frac{59}{20} = \frac{21}{20} = 1 \frac{1}{20} = 1.05$

2) а)

$1 - \frac{23}{30} = \frac{30 - 23}{30} = \frac{7}{30}$

б)

$2 \frac{5}{6} + 3 \frac{7}{12} = \frac{17}{6} + \frac{43}{12} = \frac{77}{12} = 6 \frac{5}{12}$

в)

$7 \frac{6}{7} + 2 \frac{3}{14} = \frac{55}{7} + \frac{31}{14} = \frac{141}{14} = 10 \frac{1}{14}$