Số?

a) 1 cm² = ..?.. mm²                                                    100 mm² = ..?.. cm²

1 dm² = ..?.. cm²                                                         100 cm² = ..?.. dm²

1 m² = ..?.. dm²                                                           1 m² = ..?.. cm²

b) 2 cm² = ..?.. mm²                                                    5 m² = ..?.. cm²

4 dm² = ..?.. cm²                                                         1 dm² 6 cm² = ..?.. cm²

3 m² = ..?.. dm² = ..?.. cm²                                         1 m² 5 dm² = ..?.. dm²

c) 1 phút = ..?.. giây                                                    1 thế kỉ = ..?.. năm

1 phút 30 giây = ..?.. giây                                           100 năm = ..?.. thế kỉ

a) 1 cm² = 100 mm²                                                    100 mm² = 1 cm²

1 dm² = 100 cm²                                                         100 cm² = 1 dm²

1 m² = 100 dm²                                                           1 m² = 10 000 cm²

b) 2 cm² = 200 mm²                                                    5 m² = 50 000 cm²

4 dm² = 400 cm²                                                         1 dm² 6 cm² = 106 cm²

3 m² = 300 dm² = 30 000 cm²                                    1 m² 5 dm² = 105 dm²

c) 1 phút = 60         giây                                             1 thế kỉ = 100 năm

1 phút 30 giây = 90 giây                                            100 năm = 1 thế kỉ