(-12/5 + 5 /12 +1/4 ) + 7/5 + -19/12 + 2/12 )-1 giúp mik với
2 câu trả lời
[($\dfrac{-12}{5}$+$\dfrac{5}{12}$+$\dfrac{1}{4}$)+$\dfrac{7}{5}$-$\dfrac{19}{12}$+$\dfrac{2}{12}$)]-1
=[$\dfrac{-12}{5}$+$\dfrac{7}{5}$]+[$\dfrac{5}{12}$-$\dfrac{19}{12}$+$\dfrac{2}{12}$]-1+$\dfrac{1}{4}$
= (-1)+(-1)+$\dfrac{1}{4}$-1
=(-2)+$\dfrac{1}{4}$-1
= $\dfrac{-11}{4}$
Đáp án:
`(-12/5 + 5 /12 +1/4 ) + 7/5 + -19/12 + 2/12 -1`
`= (-12/5 + 7/5) + (5/12 - 19/12 + 2/12) + 1/4 - 1`
`= (-1) + (-1) + 1/4 - 1`
`= -2 + 1/4 - 1`
`= (-8)/4 + 1/4 - 4/4`
`= -11/4`
$#dariana$