1.
a) 8,4
b) 0,0245
2.
\(\dfrac{3}{5}+\dfrac{1}{2}+\dfrac{3}{10}\)\(=\dfrac{6}{10}+\dfrac{5}{10}+\dfrac{3}{10}\)
\(=\dfrac{6+5+3}{10}\)
\(=\dfrac{14}{10}=...\)
Câu 1:
a) 84 000 m^2 = 8,4 ha
b) 245 dam^2 = 0,0245 km^2
Câu 2:
3/5 + 1/2 + 3/10
= 6/10 + 5/10 + 3/10
= 14/10
= 7/5