Question

Va rog ! Am nevoie urgent

Answer 1

1. (1/4 + 1/8 - 3/2)×4/9 =

(2/8+1/8-12/8)×4/9 =

-9/8×4/9 = -1/2

2. [(3/3-2/3)⁻¹×(6/3-4/3)⁻¹×4/27+5/3]×3/7 =

[(1/3)⁻¹×(2/3)⁻¹×4/27+5/3]×3/7 =

(9/2×4/27+5/3)×3/7 =

(2/3+5/3)×3/7 =

7/3×3/7 = 1

3. [15/7×(15/5-1/5)×5/12-1/2]⁻¹+1/2 =

(15/7×14/5×5/12-1/2)⁻¹+1/2 =

(5/2-1/2)⁻¹+1/2 =

1/2 + 1/2 = 2/2 = 1

Answer 2

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