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

Toán Lớp 5: 30m = km A 30 000 B 0,3 C 0,03 D 3

Toán Lớp 5: 30m = km
A 30 000
B 0,3
C 0,03
D 3

Comments ( 2 )

  1. 30m= 0,03km.
    Vì 1km = 1000m nên muốn đổi 30m sang km ta lấy: 30 : 1000= 0,03km.

  2. 30m=…km
    Vì 1m=1/1000km
    =>30m=30. 1/1000=0,03km
    -> Chọn C

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