The document discusses estimating quotients using compatible numbers. It explains that compatible numbers are multiples of the divisor that can be used to break down division problems into easier steps. Several examples are shown such as 3,456 ÷ 5 = 600 by dividing 3,000 by 5, and 4,128 ÷ 8 = 500 by dividing 4,000 by 8. Estimating quotients using compatible numbers makes large division problems more manageable.

1. 5-2 Estimating
Quotients
Math Notes
Number Sense 1.0

2. What you’re learning today...

3. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.

4. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.
You’ve used compatible numbers with adding/
subtracting...

5. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.
You’ve used compatible numbers with adding/
subtracting...
3,456 ÷ 5 = ?

6. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.
You’ve used compatible numbers with adding/
subtracting...
3,456 ÷ 5 = ?

7. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.
You’ve used compatible numbers with adding/
subtracting...
3,456 ÷ 5 = ?

8. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.
You’ve used compatible numbers with adding/
subtracting...
3,456 ÷ 5 = ?

9. What you’re learning today...
Number Sense 1.0 - Computing with positive
integers.
You’ve used compatible numbers with adding/
subtracting...
3,456 ÷ 5 = ?
3,000 ÷ 5 = 600

10. Compatible Numbers

11. Compatible Numbers
6400 ÷ 7 =

12. Compatible Numbers
6400 ÷ 7 =

13. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400 ÷ 7 =

14. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400 ÷ 7 =

15. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400 ÷ 7 =
63

16. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400 ÷ 7 =
6300

17. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400
6300 ÷ 7 =

18. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400
6300 ÷ 7 = 9

19. Compatible Numbers
7, 14, 21, 28, 35, 42,
49, 56, 63, 70, 77
6400
6300 ÷ 7 = 900

20. Compatible Numbers

21. Compatible Numbers
4128 ÷ 8 =

22. Compatible Numbers
4128 ÷ 8 =

23. Compatible Numbers
8, 16, 24, 32, 40, 48
4128 ÷ 8 =

24. Compatible Numbers
8, 16, 24, 32, 40, 48
4128 ÷ 8 =

25. Compatible Numbers
8, 16, 24, 32, 40, 48
4128 ÷ 8 =
40

26. Compatible Numbers
8, 16, 24, 32, 40, 48
4128 ÷ 8 =
4000

27. Compatible Numbers
8, 16, 24, 32, 40, 48
4128
4000 ÷ 8 =

28. Compatible Numbers
8, 16, 24, 32, 40, 48
4128
4000 ÷ 8 = 5

29. Compatible Numbers
8, 16, 24, 32, 40, 48
4128
4000 ÷ 8 = 500

30. Compatible Numbers

31. Compatible Numbers
152 ÷ 18 =

32. Compatible Numbers
Looking at BOTH
dividend & divisor
152 ÷ 18 =

33. Compatible Numbers
Looking at BOTH
dividend & divisor
152 ÷ 18 =

34. Compatible Numbers
Looking at BOTH
dividend & divisor
152 ÷ 18 =

35. Compatible Numbers
Looking at BOTH
dividend & divisor
152 ÷ 20 =

36. Compatible Numbers
Looking at BOTH
dividend & divisor 20, 40, 60, 80, 100,
120, 140, 160
152 ÷ 20 =

37. Compatible Numbers
Looking at BOTH
dividend & divisor 20, 40, 60, 80, 100,
120, 140, 160
152 ÷ 20 =
160

38. Compatible Numbers
Looking at BOTH
dividend & divisor 20, 40, 60, 80, 100,
120, 140, 160
152
160 ÷ 20 =

39. Compatible Numbers
Looking at BOTH
dividend & divisor 20, 40, 60, 80, 100,
120, 140, 160
152
160 ÷ 20 = 8

40. Compatible Numbers

41. Compatible Numbers
8176 ÷ 23 =

42. Compatible Numbers
Looking at BOTH
dividend & divisor
8176 ÷ 23 =

43. Compatible Numbers
Looking at BOTH
dividend & divisor
8176 ÷ 23 =

44. Compatible Numbers
Looking at BOTH
dividend & divisor
8176 ÷ 23 =

45. Compatible Numbers
Looking at BOTH
dividend & divisor
8176 ÷ 20 =

46. Compatible Numbers
Looking at BOTH
dividend & divisor
20, 40, 60, 80
8176 ÷ 20 =

47. Compatible Numbers
Looking at BOTH
dividend & divisor
20, 40, 60, 80
8176 ÷ 20 =
8000

48. Compatible Numbers
Looking at BOTH
dividend & divisor
20, 40, 60, 80
8176
8000 ÷ 20 =

49. Compatible Numbers
Looking at BOTH
dividend & divisor
20, 40, 60, 80
8176
8000 ÷ 20 = 400