`@tk.duonq`

`2\ \text{dm}^{2}\ 10\ \text{cm}^{2}\ =\ 210\ \text{cm}^{2}`

`•2\ \text{dm}^2\ 10\ \text{cm}^{2}\ =\ 200\ \text{cm}^{2}\ +\ 10\ \text{cm}^{2}\ =\ 210\ \text{cm}^{2}`

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`1824\ \text{cm}^{2}\ >\ 18\ \text{dm}^{2}`

`•18\ \text{dm}^{2}\ =\ 18\ \text{dm}^{2}\ xx\ 100\ =\ 1800\ \text{cm}^{2}`

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`3\ \text{cm}^{2}\ 5\ \text{m}^{2}\ 4\ \text{cm}^{2}\ <\ 540\ \text{cm}^{2}`

`•3\ \text{cm}^{2}\ 5\ \text{m}^{2}\ 4\ \text{cm}^{2}\ =\ 3\ \text{cm}^{2}\ +\ 50000\ \text{cm}^{2}\ +\ 4\ \text{cm}^{2}\ =\ 50007\ \text{cm}^{2}`

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`15\ \text{m}^{2}\ 4\ \text{dm}^{2}\ <\ 1540\ \text{dm}^{2}`

`•15\ \text{m}^{2}\ 4\ \text{dm}^{2}\ =\ 1500\ text{dm}^{2}\ 4\ \text{dm}^{2}\ =\ 1505\ text{dm}^{2}`

Đáp án + Giải thích các bước giải

2 dm² 10 cm² = 210 cm²

1 dm² = 100 cm², 2 dm² 10 cm² = 200 + 10 = 210 cm²

210 cm² = 210 cm²

1824 cm² > 18 dm²

1 cm² = 0,01 dm², 1824 cm² = 18 x 0,01 = 18,24 dm²

18,24 dm² > 18 dm²

3 cm² 5m² 4 cm² > 540 cm²

1 m² = 10000 cm², 3 cm² 5m² 4 cm² = 3 + 50000 + 4 = 50007 cm²

50007 cm² > 540 cm²

15 m² 4 dm² < 1540 dm²

1 m² = 100 dm², 15 m² 4 dm² = 1500 + 4 = 1504 dm²

1504 dm² < 1540 dm²

Câu D đơn vị là m² ạ không phải m