Tính: 417 ml – 236 ml = ...

417 ml – 236 ml = 181 ml

250 g – 160 g = 90 g

417 mm + 58 mm = 475 mm

162 ml + 351 ml = 513 ml

73 g + 27 g – 40 g = 60 g

92 mm – 34 mm + 12 mm = 70 mm