有關小學數學問題一問

1 吋 = 2.54 cm
1 cm = 10 mm
1 呎 = 12 吋

42 吋 = 42 吋 x (2.54 cm/吋)
42 吋 = 106.68 cm

42 吋 = 106.68 cm x (10 mm/cm)
42 吋 = 1066.8 mm

42 吋 = 42 吋 x (1 呎/12 吋)
42 吋 = 3.5 呎
=

1英尺(尺) = 12 英寸 = 30.48 厘米(cm) = 304.8mm