(5½-3¼)²÷7=
(5½-3¼)²÷7=
(5 i dwie czwarte - 3 jedna czwarta) ^2 /7 = 2 jedna czwarta ^2 /7 = 81/16 / 7 = 81/112
(5½-3¼)²÷7= (5 2/4-3¼)²÷7=(2.25)²÷7=0.72321429
(5½-3¼)²÷7= (5²/₄-3¼)²÷7 = (2¼)²÷7=(⁹/₄)²÷7 = ⁸¹/₁₆÷7 = ⁸¹/₁₆×¹/₇= ⁸¹/₁₁₂