Toán Lớp 6: 2/15 + (5/9 + -6/9 ) Tính nhanh nhá
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Toán Lớp 6: 2/15 + (5/9 + -6/9 ) Tính nhanh nhá
Comments ( 2 )
2/15 + (5/9 + (-6)/9)
= 2/15 + (5/9 – 6/9)
= 2/15 + (-1)/9
= 2/15 – 1/9
= 6/45 – 5/45
= 1/45
#Mỏn
$\text{$\frac{2}{15}$+($\frac{5}{9}$+$\frac{-6}{9}$)}$$\\$$\text{=$\frac{2}{15}$+$\frac{-1}{9}$}$$\\$$\text{=$\frac{6}{45}$+$\frac{-5}{45}$}$$\\$$\text{=$\frac{1}{45}$}$