12吨的4分之3是多少吨？ 12 ×(3/4) = 9 (吨) 比12吨多4分之3是多少吨？ 12 + 12 × (3/4) = 12 + 9 = 21 (吨)比12吨多4分之1是多少吨 12 + 12 × (1/4) = 12 + 3 = 15 (吨)
