Đáp án:
`12 m^2 45 cm^2 = 12,0045 m^2`
Giải thích các bước giải:
Vì `1 m^2 = 10000 cm^2`
`=> 12 m^2 45 cm^2 = 12,0045 m^2`
12,0045m²
12m² 45cm²
đổi 45cm² = 0,00045m²
12m² + 0,00045m² = 12,0045m²
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