Explore Multiplication Strategies. Direct students' attention to the Handy Facts pages in the Student Guide. Assign Questions 1–6 to student pairs. Students will practice using strategies to solve multiplication facts.
When students have completed the questions, discuss some of the strategies presented on the page.
- Show how to use a number line to solve facts like 3 × 11 and 3 × 12.
- Give an example of how Richard could use doubles to multiply by 2. (Possible response: He just doubles the number he is multiplying. To solve 2 × 8, he doubles 8. 8 + 8 = 16.)
- Do you have a strategy you like to use to multiply by 2?
- Give an example of how Rosa uses the 10s to help her multiply by 5. (Possible response: To solve 5 × 10, Rosa would think of 10 × 10 = 100. Because 5 is half of 10, she splits 100 in half to get 50. 5 × 10 = 50.)
- Do you have a strategy you like to use to multiply by 5?
Practice Handy Facts. Assign the Practicing Handy Facts pages in the Student Activity Book. Students will practice using the multiplication table, recalling facts for 0, 1, 2, 3, 5, and 10, and using patterns. Encourage students to use the patterns in the multiplication chart to help them explain their answers.
Use Check-In: Questions 18–22 on the Practicing Handy Facts pages in the Student Activity Book to assess students' progress toward the following Expectations:
- Represent multiplication problems with drawings and number sentences [E1].
- Use strategies to solve multiplication problems [E2].
- Use the multiplication properties of 0 to solve multiplication problems [E3].
- Identify and use patterns to solve the multiplication facts for the 2s, 3s, 5s, and 10s [E5].
The workshop in Lesson 10 provides targeted practice with representing and using strategies to solve the multiplication facts.
