Question

Найди значения выражений и соедини с
результатом.
10 7/20-5 3/5
17 3/35-12 11/14
18 5/11 -13 21/22​

Answer 1

Пошаговое объяснение:

$10\dfrac{7}{20} -5\dfrac{3}{5} =10\dfrac{7}{20}^{\backslash1}-5\dfrac{3}{5}^{\backslash4}=5\dfrac{7-12}{20} =4\dfrac{20+7-12}{20} =4\dfrac{15}{20} =4\dfrac{3}{4} ;$

$17\dfrac{3}{25} -12\dfrac{11}{14} =17\dfrac{3}{35}^{\backslash2}-12\dfrac{11}{14}^{\backslash5}=5\dfrac{6-55}{70} =4\dfrac{70+6-55}{70} =4\dfrac{21}{70} =4\dfrac{3}{10} ;$

$18\dfrac{5}{11} -13\dfrac{21}{22} =18\dfrac{5}{11}^{\backslash2}-13\dfrac{21}{22}^{\backslash1}=5\dfrac{10-21}{22} =4\dfrac{22+10-21}{22} =4\dfrac{11}{22} =4\dfrac{1}{2} .$

Answer 2

Ответ:

1) 4 3/4 = 4,75

2) 4 3/10 = 4,3

3) 4 1/2 = 4,5

Пошаговое объяснение:

$10 \frac{7}{20} - 5 \frac{3}{5} = 10 \frac{7}{20} - 5 \frac{3 \times 4}{5 \times 4} = 10 \frac{7}{20} - 5 \frac{12}{20} = 9 \frac{20}{20} + \frac{7}{20} - 5 \frac{12}{20} = 9 - 5 + \frac{20 + 7 - 12}{20} = 4 \frac{15}{20} = 4 \frac{3}{4} = 4.75$

$17 \frac{3}{35} - 12 \frac{11}{14} = 17 \frac{3 \times 2}{35 \times 2} - 12 \frac{11 \times 5}{14 \times 5} = 17 \frac{6}{70} - 12 \frac{55}{70} = 16 \frac{6}{70} + \frac{70}{70} - 12 \frac{55}{70} = 16 - 12 + \frac{6 + 70 - 55}{70} = 4 \frac{21}{70} = 4 \frac{3}{10} = 4.3$

$18 \frac{5}{11} - 13 \frac{21}{22} = 18 \frac{5 \times 2}{11 \times 2} - 13 \frac{21}{22} = 18 \frac{10}{22} - 13 \frac{21}{22} = 17 \frac{10}{22} + \frac{22}{22} - 13 \frac{21}{22} = 17 - 13 + \frac{10 + 22 - 21}{22 } = 4 \frac{11}{22} = 4 \frac{1}{2} = 4.5$