Toán Lớp 6: a) ⅖×4 – ⅗ × 7 × 3/2 b) (-2)× -1/24 + ( 4/3 – 1⅚ ) : 3/14

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2. 2/5 xx 4 – 3/5 xx 7 xx 3/2

   = 8/5 – 21/5 xx 3/2

   =8/5 – 63/10

   = 16/10 – 63/10

   = -47/10

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   b) (-2) xx \frac{-1}{24}+ ( 4/3 – 1 5/6) : 3/14

   = 1/12 + (-1/2) : 3/14

   = 1/12 + (-7/3)

   = -9/4

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