Toán Lớp 6: 1/2 – 15/17 + 1/2 – 2/17 -108/322 có thể giúp em không ạ
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Toán Lớp 6: 1/2 – 15/17 + 1/2 – 2/17 -108/322 có thể giúp em không ạ
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1/2 – 15/17 + 1/2 – 2/17 -108/322
=(1/2+ 1/2 )+(- 15/17 – 2/17) -108/322
=2/2 -17/17 – 108/322
=1-1-108/322
=0-108/322
=-108/322
=-54/161
$#Star$
$\text{Theo đề bài, ta có: }$$\\$ $\text{$\dfrac{1}{2}$ – $\dfrac{15}{17}$ + $\dfrac{1}{2}$ – $\dfrac{2}{17}$ – $\dfrac{108}{322}$}$ $\\$ $\text{= ( $\dfrac{1}{2}$ + $\dfrac{1}{2}$) – ( $\dfrac{15}{17}$ + $\dfrac{2}{17}$ ) – $\dfrac{54}{161}$}$$\\$ $\text{= $\dfrac{2}{2}$ – $\dfrac{17}{17}$ – $\dfrac{54}{161}$}$$\\$ $\text{= 1 – 1 – $\dfrac{54}{161}$}$$\\$ $\text{= ( 1 – 1 ) – $\dfrac{54}{161}$}$$\\$ $\text{= 0 – $\dfrac{54}{161}$}$
$\text{= – $\dfrac{54}{161}$}$