Môn Toán Lớp 6: ( 2/9 + (-1)/4 – 1) + 3/(-14) – 1

($\dfrac{2}{9}$ + $\dfrac{-1}{4}$ – ${1}$) ${+}$ $\dfrac{3}{-14}$ ${-}$ ${1}$

${=}$ (8/36 + (-9)/36 – $\dfrac{36}{36}$) + 3/(-14) – 1

${=}$ (-37)/36 + 3/(-14) – 1

${=}$ (-313)/252 – 1

${=}$ (-313)/252 – 252/252

${=}$ (-565)/252