Unit 7 Contents

Find the products using Nila's or Alexis's way.

1. 9 50
2. 40 7
3. 5 400
4. 
5. 

6. 600 600
7. 700 900

8. Show how to solve Question 4 using Irma's rectangle method.


9. Linda started solving 700 900 this way: 700 900 = 7 100 9 100. Show how she can use the turn-around rule to solve the problem.

Find the products in Questions 10–20 using any strategy you choose. Check your work on a calculator if needed.

10. 
11. 
12. 600 40




13. 
14. 
15. 




16. 400 200
17. 6000 700
18. 40 11
19. 120 60
20. 400 22

Find the value of n in Questions 21–26.

21. 200 n = 1400
22. 60 n = 42,000
23. n 800 = 64,000
24. n 50 = 250,000
25. 6000 5 = n 600
26. 400 30 = 4 3 n

27. Explain how to multiply two numbers that end in zeros. Show why your method works.