Bài 3 : 9m 50cm > 905cm 4km 6m > 40hm 5m 500m < 5 km 5dam = 005 km 5m 56cm = 556cm 5km 7m < 57hm
Bài 4 : a) 3 m 40 cm + 4 m 24 cm - 5 m 69 cm = 195 cm .
b) 72 m 6 cm - 56 m 50 cm + 7 m 44 cm = 320 cm .
c)8 m 27 dm + 3 m 35 cm + 3 dm 65 cm = 11670 cm .
f) 87 m 23 dm : 2 = 4465 cm .
g) 9 m 8 dm 7 cm : 3 = 329 cm .
i) 19 dm 8 cm : 3 = 66 cm .
j) 36 m 8 dm 7 cm : 3 = 1229 cm