MXECA09AWK4X_PH_C07_L2.indd Page PW41 7/29/09 10:54:26 PM elhi-2
/Volumes/105/HMH0002/work%0/indd%0/Grade 4_PW/Ch07/MXECA09ASE4X_PHTE_C07_L2
Name
Lesson 7.2
Mental Math: Estimate Products
Estimate the product. Write the method.
1. 2 ! 49
2. 7 ! 31
3. 5 ! 58
4. 4 ! 73
5. 3 ! 27
6. 8 ! 26
7. 4 ! 25
8. 5 ! 82
9. 6 ! 53
10. 9 ! 47
11. 6 ! 71
12. 5 ! 31
14. 29
15. 65
16. 39
13. 88
!2
_
!
8
_
!
7
_
!
4
_
Problem Solving and Test Prep
USE DATA For 17–19, use the table.
Pencils Used Each Month
in 8 months?
Name
18. How many more pencils will Haley use
© Harcourt
in ten months than Abby will use in ten
months?
19. Which number sentence gives the
Number of Pencils
Haley
18
Abby
12
Bridget
17
Kelsey
21
20. Which number sentence would give
best estimate of 6 ! 17?
the best estimate of 6 ! 51?
A 6 ! 20
A 6!5
6 ! 25
C 6 ! 10
D 6!5
B
B
6 ! 45
C 6 ! 50
D 6 ! 55
PW41
Practice
© Harcourt
17. About how many pencils will Haley use