Matemática, perguntado por isabelazanonprimon, 5 meses atrás

A) 1/2+5/2 B)4/6+2/2 C)3/5+2/3 D)2/5+1/4 E)2/3-5/6 F)-3/5+1/10 J)-1/2+1/6

Soluções para a tarefa

Respondido por natoliveira8
0

Explicação passo-a-passo:

A)

 \frac{1}{2}  +  \frac{5}{2}  =  \frac{1 + 5}{2}  =  \frac{ 6 }{2}  = 3

B)

 \frac{4}{6}  +  \frac{2}{2}  =  \frac{4 + (3 \times 2)}{6}  =  \frac{4 + 6}{6}  =  \frac{10}{6}  =  \frac{5}{3}

C)

 \frac{3}{5}  +  \frac{2}{3}  =  \frac{(3 \times 3) + (5 \times 2)}{15}  =  \frac{9 + 10}{15}  =  \frac{19}{15}

D)

 \frac{2}{5}  +  \frac{1}{4}  =  \frac{(4 \times 2) + (5 \times 1)}{20}  =  \frac{8 + 5}{20}  =  \frac{13}{20}

E)

 \frac{2}{3}  -  \frac{5}{6}  =  \frac{(2 \times 2) - 5}{6}  =  \frac{4 - 5}{6}  =  -  \frac{1}{6}

F)

 -  \frac{3}{5}  +  \frac{1}{10}  =  \frac{( - 3 \times 2) + 1}{10}  =  \frac{ - 6 + 1}{10}  =  -  \frac{5}{10}  =  -  \frac{1}{2}

J)

 -  \frac{1}{2}  +  \frac{1}{6}  =  \frac{( - 1 \times 3) + 1}{6}  =  \frac{ - 3 + 1}{6}  =  -  \frac{2}{6}  =  -  \frac{1}{3}

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