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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: 6,5ha = … m2 2cm2 52mm2 = … mm2

Toán Lớp 5: 6,5ha = … m2
2cm2 52mm2 = … mm2

Comments ( 2 )

  1. 6,5ha = 65000  m^2
    2cm^2 52mm^2 = 252 mm^2

  2. $\text{1 ha = 10 000 m²}$
    $\text{6,5 ha = 6,5 × 10 000 = 65 000 m²}$
    $\text{⇒ 6,5 ha = 65 000 m²}$
    $\text{1 cm² = 100 mm²}$
    $\text{2 cm² 52 mm² = 2 × 100 + 52 = 200 + 52 = 252 mm²}$
    $\text{⇒ 2 cm² 52 mm² = 252 mm²}$
    $\text{Xin hay nhất và cám ơn ạ}$

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222-9+11+12:2*14+14 = ? ( )