\( \begin{array}{ll}\text { 1. } 5 \times \ldots=-40 & \text { 6.__ } \times(-13)=78 \\ \text { 2. }(-15) \times 17=\ldots & \text { 7. } 7 \times \ldots=-84 \\ \text { 3. } \_ \text {x } \times(-19)=228 & \text { 8. }(-33) \times=(-4)=\ldots \\ \text { 4. }(-9) \times \_=-99 & \text { 9.__ } \times 44=-308 \\ \text { 5.__ } \times 15=165 & 10 .-25 \times \ldots=250\end{array} \)

1. \( \frac{1}{3} \times \frac{2}{5} \)

1) \( \left[\begin{array}{l}3 \\ 4\end{array}\right]-\left[\begin{array}{l}-5 \\ -1\end{array}\right] \)

1. \( \frac{2}{3}+\frac{5}{3} \)

Write each decimal as a percent. \( \begin{array}{l}\text { 10. } 3.9 \\ \text { 11. } 81\end{array} \) \( \begin{array}{ll}\text { 18. } 6.75 & \text { 14. } 2.81 \\ \text { 16. } 0.0046 & \text { 17. } 0.0069\end{array} \) Write each number as a percent.

Convince Me! Use Structure Dario says, "I can find \( 9 \times 0<3 \times 1 \) without computing. I can think about properties that I know." What could he mean?