Bài 4: Viết số thích hợp vào chỗ châm:
a) 38 m² 25 dm² = .3825... dm²
15dm² 9cm² = .1509...cm²
10 cm² 6 mm² = ..1006.. mm²
1hm² 15dam² = .11500...m²
12km² 4dam² = .12000400..m²
b) 198 cm² = ...1.dm²..98..cm²
2080 dm² = ...20. m² .80...dm²
3107 mm² = ...31. cm²...7.mm²
5427 dam² =..54.hm².27..dam²
6027hm² =.60..km²..27..km²

a) 38 m² 25 dm² = .3825... dm²
15dm² 9cm² = .1509...cm²
10 cm² 6 mm² = ..1006.. mm²
1hm² 15dam² = .11500...m²
12km² 4dam² = .12000400..m²
b,
b) 198 cm² = ..1..dm².98...cm²
2080 dm² = ..20.. m² .80...dm²
3107 mm² = ..31.. cm².7...mm²
5427 dam² =.54..hm².27..dam²
6027hm² =.60..km²..0,0027..km²

A = 38 25 dm2
1509 cm2
1006 mm2
11500 m2
12000400 m2