Số?

a) 1 cm² = ..?.. mm²

2 cm² = ..?.. mm²

200 mm² = ..?.. cm²

b) 1 cm² 30 mm² = ..?.. mm²

8 cm² 5 mm² = ..?.. mm²

7 cm² 14 mm² = ..?.. mm²

a) 1 cm² = 100 mm²

2 cm² = 200 mm²

200 mm² = 2 cm²

b) 1 cm² 30 mm² = 130 mm²

8 cm² 5 mm² = 805 mm²

7 cm² 14 mm² = 714 mm²