Question

Va rogggg ajutatima repede

Answer 1

b) 

[tex]\it 1\dfrac{2}{5}+ 3\dfrac{1}{10} =(1+3) +(\dfrac{^{2)}2}{\ 5}+\dfrac{1}{10}) =4+\dfrac{\ 5^{(5}}{10} =4+\dfrac{1}{2} =4\dfrac{1}{2} \\ \\ \\ Sau: \\ \\ \\ 1\dfrac{2}{5}+ 3\dfrac{1}{10} =\dfrac{^{2)}7}{\ 5}+ \dfrac{31}{10} =\dfrac{\ 45^{(5}}{10} = \dfrac{9}{2}=4\dfrac{1}{2}[/tex]