Quyidagi ifodalardan Δ, ▢ va ∇ amallarini aniqlang: ⁴/₃ Δ ²/₁₂ = 8; ¹⁵/₂₀ ▢ 5 = 3 ³/₄; ⁷/₁₂ ∇ ¹/₆ = ³/₄
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Birinchi ifodada ⁴/₃ ÷ ²/₁₂ = ⁴/₃ × ¹²/₂ = 8, demak Δ — bo'lish (÷). Ikkinchi ifodada ¹⁵/₂₀ = ³/₄ va ³/₄ × 5 = ¹⁵/₄ = 3 ³/₄, demak ▢ — ko'paytirish (x). Uchinchi ifodada ⁷/₁₂ + ¹/₆ = ⁷/₁₂ + ²/₁₂ = ⁹/₁₂ = ³/₄, demak ∇ — qo'shish (+).
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