1) a) 4,9m=….cm b) 500m=…cm 2,13m=…..cm 420mm….cm 3,8m=….cm 85mm=….cm 5,89=…

2 bình luận về “1) a) 4,9m=….cm b) 500m=…cm 2,13m=…..cm 420mm….cm 3,8m=….cm 85mm=….cm 5,89=…”

1. a)4,9m=490cm

   2,13m=213cm

   3,8m=380cm

   5,89m=589cm

   b)500mm=5cm

   420mm=4,2cm

   85mm=0,85cm

   8mm=0,08cm

   Trả lời
2. a)

   4,9 m = 490 cm

      (4,9 m = 4,9 xx 100 = 490 cm)

   2,13 m = 213 cm

      ( 2,13 m = 2,13 xx 100 = 213 cm)

   5,89 m = 589 cm

       ( 5,89 m = 5,89 xx 100 = 589 cm)

   b)

   500 m = 50000 cm

      ( 500 m = 500 xx 100 = 50000 cm)

   420 mm = 42 cm

      ( 420 mm = 420 : 10 = 420/10 = 42 cm)

   85 mm = 8,5 cm

     ( 85 mm = 85 : 10 = 85/10 = 8,5 cm)

   8 mm = 0,8 cm

     ( 8 mm = 8 : 10 = 8/10 = 0,8 cm)

    

   Trả lời