(-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`

$#dariana$