Câu hỏi của Nguyễn Phương Linh

Question

2/5+-1/5-3/4-(-2/3) giúp mình với mình đang cần gấp

o l m . v n

༺ღ¹⁷⁰⁶²⁰¹⁰H𝚘̷àทջ✎﹏ᑭh𝚘̷ทջღ²ᵏ¹⁰༻ღtea... · Accepted Answer

$\frac{2}{5}+\frac{-1}{5}-\frac{3}{4}-\frac{-2}{3}\text{ }$

$=\frac{2}{5}+\frac{-1}{5}+\frac{-3}{4}+\frac{2}{3}$

$=\left(\frac{2}{5}+\frac{-1}{5}\right)+\left(\frac{-3}{4}+\frac{2}{3}\right)$

$=\frac{1}{5}+\left(\frac{-9}{12}+\frac{8}{12}\right)$

$=\frac{1}{5}+\frac{-1}{12}$

$=\frac{12}{60}+\frac{-5}{60}$

$=\frac{7}{60}$

Câu trả lời:

$\frac{2}{5}+\frac{-1}{5}-\frac{3}{4}-\frac{-2}{3}\text{ }$

$=\frac{2}{5}+\frac{-1}{5}+\frac{-3}{4}+\frac{2}{3}$

$=\left(\frac{2}{5}+\frac{-1}{5}\right)+\left(\frac{-3}{4}+\frac{2}{3}\right)$

$=\frac{1}{5}+\left(\frac{-9}{12}+\frac{8}{12}\right)$

$=\frac{1}{5}+\frac{-1}{12}$

$=\frac{12}{60}+\frac{-5}{60}$

$=\frac{7}{60}$

Nguyễn Đăng Nhân · Answer

$\frac{2}{5}+\left(-\frac{1}{5}\right)-\frac{3}{4}-\left(-\frac{2}{3}\right)$

$=\frac{2}{5}-\frac{1}{5}-\frac{3}{4}+\frac{2}{3}$

$=\frac{1}{5}-\frac{3}{4}+\frac{2}{3}$

$=\frac{12}{60}-\frac{45}{60}+\frac{40}{60}$

$=\frac{12}{60}-\left(\frac{45}{60}-\frac{40}{60}\right)$

$=\frac{12}{60}-\frac{5}{60}$

$=\frac{7}{60}$

Câu trả lời:

$\frac{2}{5}+\left(-\frac{1}{5}\right)-\frac{3}{4}-\left(-\frac{2}{3}\right)$

$=\frac{2}{5}-\frac{1}{5}-\frac{3}{4}+\frac{2}{3}$

$=\frac{1}{5}-\frac{3}{4}+\frac{2}{3}$

$=\frac{12}{60}-\frac{45}{60}+\frac{40}{60}$

$=\frac{12}{60}-\left(\frac{45}{60}-\frac{40}{60}\right)$

$=\frac{12}{60}-\frac{5}{60}$

$=\frac{7}{60}$