Learning intention: To clearly explain how the base-ten number system affects the value of numbers when they are multiplied by powers of 10. 1. Tap the button to start the activity. 2. Watch the video of the number slide and think about what it is showing. 3. Use the or tools to record your answers to each of the questions. Remember to use mathematical terms. 4. Reread or listen back to your work to check your explanations then tap the to upload your work.