Bài 4 trang 45 SGK Toán 5

Viết số thích hợp vào chỗ chấm:

a) \(12,44m =...m...cm\);                           b) \(7,4dm =...dm...cm\);

c) \(3,45km =... m\);                                  d) \(34,3km=...m\).

Lời giải

a) \(12,44m =12 \dfrac {44}{100}m= 12m \;44cm\);

b) \(7,4dm =7 \dfrac {4}{10}dm= 7dm \;4cm\);

c) \(3,45km=3,450km = 3\dfrac {450}{1000}km\)\( = 3km\; 450m = 3450m\);

d) \(34,3km=34,300km = 34\dfrac {300}{1000}km\)\( = 34km\;300m = 34 300m\).


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