Add : 6 cm 5 mm + 7 cm 9 mm. ... cm, mm. 1. 6. + 7. 5. 9. 5 mm + 9 mm = 14 mm. 1 4, 4, 14 mm = 1 cm 4 mm. ∴ 14 cm 4 mm. Concept: Problems on Measurement.
確定! 回上一頁