170 : 5 = (150 + 20) : 5 = 30 + 4 = 34
190 : 5 = (150 + 40) : 5 = 30 + 8 = 38
160 : 5 = (150 + 10) : 5 = 30 + 2 = 32
180 : 5 = (150 + 30) : 5 = 30 + 6 = 36
140 : 4 = (120 + 20) : 4 = 30 + 5 = 35
180 : 4 = (160 + 20) : 4 = 40 + 5 = 45
280 : 8 = (240 + 40) : 8 = 30 + 5 = 35
270 : 6 = (240 + 30) : 6 = 40 + 5 = 45
260 : 5 = (250 + 10) : 5 = 50 + 2 = 52
290 : 5 = (250 + 40) : 5 = 50 + 8 = 58
