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

Toán Lớp 5: Đổi đơn vik đo. 2km=. m. 34 dam=. mm

Toán Lớp 5: Đổi đơn vik đo. 2km=. m. 34 dam=. mm

Comments ( 2 )

  1. 2km=2000m
    Vì 1km=1000m
    =>1xx2km=1000xx2m=2km=2000m
    34dam=340000mm
    Vì 1 dam=10m=10000
    =>34xx1dam=34xx10m=34xx10000=34dam=340m=340000mm

  2. 2km=…m
    Ta có: 1km=1000m
    Vậy 2km=2000m
    34dam=…mm
    Ta có:
    1dam=10dm=100cm=1000mm
    Vậy 34dam=34000mm

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

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