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

Toán Lớp 5: Bài 3: 31,2 ha = km vuông 354ha= km vuông 8,3 ha= km vuông

Toán Lớp 5: Bài 3:
31,2 ha = km vuông
354ha= km vuông
8,3 ha= km vuông

Comments ( 2 )

  1. 31,2 ha=0,312 km2
    354ha=3,52 km2
    8,3ha=0,083 km2
     đó!

  2. $@Zeng$
    Vì 1km²=100ha
    →31,2ha=0,312km²
    345ha=3,45km²
    8,3ha=0,083km² 

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

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