Toán Lớp 7: $\dfrac{- 8}{18}$ – $\dfrac{15}{27}$
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Toán Lớp 7: $\dfrac{- 8}{18}$ – $\dfrac{15}{27}$
Comments ( 2 )
=(-4)/9-5/9
=((-4)-5)/9
=(-9)/9
=-1