b4.C
b5:
a.\(8\dfrac{5}{10}m\)
b.\(4\dfrac{75}{100}m\)
bài 4 : c
bài 5
8m5dm=8m+1/2 m = \(8\dfrac{1}{2}m\)
4m75cm=4m+3/4 m = \(4\dfrac{3}{4}m\)
5kg250g=5kg + 1/4kg = \(5\dfrac{1}{4}kg\)
bài 5:
a)8m5dm= 8m + 5/10 m = 8 5/10m
b)4m75cm= 4m + 75 / 10 m = 4 75/10m
c)5kg250g = 5kg + 250/10 kg = 5 250/10 kg