Question

What should be added to $(2\frac{1}{3}+2\frac{2}{5})$ to get the sum $10$?

Answer 1

Let the x be the number we have to add to make the sum equal to 10

$x+2\frac{1}{3}+2\frac{2}{5}=10\Rightarrow x+\frac{7}{3}+\frac{12}{5}=10\Rightarrow x+\frac{53+36}{15}=10\Rightarrow x=10-\frac{89}{15}=\frac{150-89}{15}=\frac{61}{15}\Rightarrow x=4\frac{1}{15}$