Tính nhanh: (3-3/4+2/3)-(2+4/3-3/2)-(1-7/3-9/2) ai lm ny mik ko 01/08/2021 Bởi Bella Tính nhanh: (3-3/4+2/3)-(2+4/3-3/2)-(1-7/3-9/2) ai lm ny mik ko
$\left(3-\dfrac{3}{4}+\dfrac{2}{3}\right)-\left(2+\dfrac{4}{3}-\dfrac{3}{2}\right)-\left(1-\dfrac{7}{3}-\dfrac{9}{2}\right)$ $=\left(\dfrac{36}{12}-\dfrac{9}{12}+\dfrac{8}{12}\right)-\left(\dfrac{24}{12}+\dfrac{16}{12}-\dfrac{18}{12}\right)-\left(\dfrac{12}{12}-\dfrac{21}{12}-\dfrac{54}{12}\right)$ $=\dfrac{19}{12}-\dfrac{22}{12}-\dfrac{-63}{12}$ $=5$ Xin hay nhất ! Bình luận
Đáp án:
Giải thích các bước giải:
$\left(3-\dfrac{3}{4}+\dfrac{2}{3}\right)-\left(2+\dfrac{4}{3}-\dfrac{3}{2}\right)-\left(1-\dfrac{7}{3}-\dfrac{9}{2}\right)$
$=\left(\dfrac{36}{12}-\dfrac{9}{12}+\dfrac{8}{12}\right)-\left(\dfrac{24}{12}+\dfrac{16}{12}-\dfrac{18}{12}\right)-\left(\dfrac{12}{12}-\dfrac{21}{12}-\dfrac{54}{12}\right)$
$=\dfrac{19}{12}-\dfrac{22}{12}-\dfrac{-63}{12}$
$=5$
Xin hay nhất !