| Draw a bar model: A = 1 unit, B = 1 unit + 250, C = 1 unit + 190. | ||
| Total = 3 units + 440 = 1,085. |
| Total in units | = | 1 + 1 + 1 = 3 units + 250 + 190 = 3 units + 440 = 1,085 |
| 3 units | = | 1,085 - 440 = 645 |
| 1 unit (A) | = | 645 รท 3 = 215 g |
| C = 1 unit + 190 | = | 215 + 190 = 405 g |