1:(8 + 12) ÷ 10 × 122:((8 + 12) ÷ 10) × 123:(8 + 12) ÷ (10 ÷ 12)4:(8 + 12) × 12 ÷ 105:((8 + 12) × 12) ÷ 106:(8 + 12) × (12 ÷ 10)7:10 × 12 - 8 × 128:(10 × 12) - 8 × 129:10 × 12 -(8 × ...