Question

Sumar fracciones ..
12/7+4/7+20/7=
15/11+10/11+21/11=
21/13+14/13+10/13=
31/17+41/17+38/17=
-
23/7-14/7=
89/13-78/13=
43/11-29/11=
103/19-94/19=
Resuelve buscando las fracciones equivalentes, has la resolución..
1) 1/5+3/10=. 2) 1/4+2/3=. 3)12/15-12/15=

Answer 1

$= \frac{12}{7} + \frac{4}{7} + \frac{20}{7}$

$= \frac{12 + 4 + 20}{7}$

$= \frac{36}{7}$

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$= \frac{15}{11} + \frac{10}{11} + \frac{21}{11}$

$= \frac{15 + 10 + 21}{11}$

$= \frac{46}{11}$

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$= \frac{21}{13} + \frac{14}{13} + \frac{10}{13}$

$= \frac{ 21 + 14 + 10}{13}$

$= \frac{45}{13}$

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$= \frac{31}{17} + \frac{41}{17} + \frac{38}{17}$

$= \frac{31 + 41 + 38}{17}$

$= \frac{110}{17}$

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$= \frac{23}{7} - \frac{14}{7}$

$= \frac{23 - 14}{7}$

$= \frac{9}{7}$

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$= \frac{89}{13} - \frac{78}{13}$

$= \frac{89 - 78}{13}$

$= \frac{11}{13}$

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$= \frac{43}{11} - \frac{29}{11}$

$= \frac{43 - 29}{11}$

$= \frac{14}{11}$

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$= \frac{103}{19} - \frac{94}{19}$

$= \frac{103 - 94}{19}$

$= \frac{9}{19}$

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$= \frac{1}{5} + \frac{3}{10}$

$= \frac{2}{10} + \frac{3}{10}$

$= \frac{2 + 3}{10}$

$= \frac{5}{10}$

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$= \frac{1}{4} + \frac{2}{3}$

$= \frac{3}{12} + \frac{8}{12}$

$= \frac{3 + 8}{12}$

$= \frac{11}{12}$

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$= \frac{12}{15} - \frac{12}{15}$

$= \frac{12 - 12}{15}$

$= \frac{0}{15}$

$= 0$

Corona?