Evaluate: $\frac{3}{10} + \frac{4}{10}$ (Give your answer in simplest form).Evaluate: $\frac{1}{3} + \frac{2}{5}$Evaluate: $\frac{7}{8} - \frac{3}{4}$Evaluate: $3\frac{1}{2} - 1\frac{3}{4}$Evaluate: $0.4 \times 12$Evaluate: $0.15 \times 5$True or False: Multiplying a whole number by a proper fraction like $\frac{2}{3}$ will always result in a product smaller than the original whole number. Explain your answer using the concept of scaling.Scale the number $45$ by a factor of $\frac{1}{9}$. What is the result?Evaluate: $2\frac{1}{3} + \left(-\frac{2}{3}\right)$Solve: $\frac{5}{6} - \left(-\frac{1}{6}\right)$Convert to an improper fraction and evaluate: $4 - 1\frac{2}{5}$If $18 \times 6 = 108$, determine the exact answer to $0.18 \times 6$ without a calculator by explaining the decimal shift.