1:4 - (8 - 10) × 102:4 - ((8 - 10) × 10)3:4 + (10 - 8) × 104:4 + ((10 - 8) × 10)5:4 - (10 × (8 - 10))6:4 - 10 ×(8 - 10)7:4 + (10 × (10 - 8))8:4 + 10 ×(10 - 8)9:(4 - 10 ÷ 10) × 810:(4 - (10 ...