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Đáp án`+`Giải thích các bước giải:

`-1/3 - -3/5 - 1/6 + 1/43 - -3/7 + -1/2 - 1/35`

`= -1/3 + 3/5 - 1/6 + 1/43 + 3/7 - 1/2 - 1/35`

`= (-1/3 - 1/6 - 1/2) + (3/5 + 3/7 - 1/35) + 1/43`

`= - (2/6 + 1/6 + 3/6) + (21/35 + 15/35 - 1/35) + 1/43`

`= - (1) + 1 + 1/43`

`= -1 + 1 + 1/43`

`= 1/43`

$\color{#1c1c1c}{\text{G}}$$\color{#2a2043}{\text{o}}$$\color{#291063}
{\text{d}}$$\color{#53008}{\text{M}}$$\color{#6b28ac}
{\text{a}}$$\color{#8c4ebd}{\text{t}}$$\color{#B592D6}
{\text{h}}$$\color{#ceaedf}{\text{s}}$

`-1/3 -(-3)/5 -1/6 +1/43 -(-3)/7 +(-1)/2 -1/35`

`= -1/3 +3/5 -1/6 +1/43 +3/7 -1/2 -1/35`

`=(-1/3-1/6-1/2)+(3/5-1/35 +3/7)+1/43`

`=(-2/6 -1/6 -3/6) +(21/35 -1/35 +15/35) +1/43`

`= -6/6 +35/35 +1/43`

`= -1+1+1/43`

`=1/43`