4. 36 + 60 : 4 × 2 + 34 42 + 54 : 3 × 2 – 18 (760 + 100) – (430 + 230) (970 – 340) + (250 + 120)

36 + 60 : 4 × 2 + 34 = 36 + 15 × 2 + 34 = 36 + 30 + 34 = 66 + 34 = 100

42 + 54 : 3 × 2 – 18 = 42 + 18 × 2 – 18 = 42 + 36 – 18 = 78 – 18 = 60

(760 + 100) – (430 + 230) = 860 – 660 = 200

(970 – 340) + (250 + 120) = 630 + 370 = 1000