（1／2＋1／3－1／6＋5／72）÷72

1个回答

(1/2 + 1/3 - 1/6 + 5/72) ÷ 72
= (36/72 + 24/72 - 12/72 + 5/72) × 1/72
= (36 + 24 - 12 + 5)/72 × 1/72
= 53/72 × 1/72
= 53/5184