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

Toán Lớp 5: 1m35cm=…m,47,08dm=…m,53km2 7dam2=…km2

Toán Lớp 5: 1m35cm=…m,47,08dm=…m,53km2 7dam2=…km2

Comments ( 2 )

  1. 1m 35cm = 1m + 35/100m = 1m + 0,35m = 1,35m
    47,08dm = 47,08 : 10 = 4,708m
    53km^2 7dam^2 =53km^2 =7/10000km^2 =53km^2 +0,0007km^2 =53,0007km^2
    #dtkc

  2. 1 m 35 cm = 1 , 35 m
    vì 1 cm = 1 / 100 m
    47 , 08 dm = 4 , 708 m
    vì 1 dm = 1 / 10 m
    53 km2 7 dam2 = 53 , 0007 km2
    vì 1 km2 = 10000 dam2
     

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