Tính tổng (quy đồng) 1/2+1/6+1/12+1/20+1/+30 29/08/2021 Bởi Ayla Tính tổng (quy đồng) 1/2+1/6+1/12+1/20+1/+30
$\dfrac{1}{2}$ + $\dfrac{1}{6}$ + $\dfrac{1}{12}$ + $\dfrac{1}{20}$ + $\dfrac{1}{30}$ `=` $\dfrac{30}{60}$ + $\dfrac{10}{60}$ + $\dfrac{5}{60}$ + $\dfrac{3}{60}$ + $\dfrac{2}{60}$ `=` $\dfrac{30 + 10 + 5 + 3 + 2}{60}$ `=` $\dfrac{5}{6}$ Bình luận
Đáp án: $\dfrac{5}{6}$ Giải thích các bước giải: $\dfrac{1}{2}$ $+$ $\dfrac{1}{6}$ $+$ $\dfrac{1}{12}$ $+$ $\dfrac{1}{20}$ $+$ $\dfrac{1}{30}$ $=$ $\dfrac{30}{60}$ $+$ $\dfrac{10}{60}$ $+$ $\dfrac{6}{60}$ $+$ $\dfrac{3}{60}$ $+$ $\dfrac{2}{60}$ $=$ $\dfrac{30 + 10 + 5 + 3 + 2}{60}$ $=$ $\dfrac{50}{60}$ $=$ $\dfrac{5}{6}$ Bình luận
$\dfrac{1}{2}$ + $\dfrac{1}{6}$ + $\dfrac{1}{12}$ + $\dfrac{1}{20}$ + $\dfrac{1}{30}$
`=` $\dfrac{30}{60}$ + $\dfrac{10}{60}$ + $\dfrac{5}{60}$ + $\dfrac{3}{60}$ + $\dfrac{2}{60}$
`=` $\dfrac{30 + 10 + 5 + 3 + 2}{60}$
`=` $\dfrac{5}{6}$
Đáp án:
$\dfrac{5}{6}$
Giải thích các bước giải:
$\dfrac{1}{2}$ $+$ $\dfrac{1}{6}$ $+$ $\dfrac{1}{12}$ $+$ $\dfrac{1}{20}$ $+$ $\dfrac{1}{30}$
$=$ $\dfrac{30}{60}$ $+$ $\dfrac{10}{60}$ $+$ $\dfrac{6}{60}$ $+$ $\dfrac{3}{60}$ $+$ $\dfrac{2}{60}$
$=$ $\dfrac{30 + 10 + 5 + 3 + 2}{60}$
$=$ $\dfrac{50}{60}$ $=$ $\dfrac{5}{6}$