UNIT NINE
1. How
much do three 20-pound racoons weigh? Show your
work.
2. Use
partial products or the lattice method to solve.
94
 6
3. Put
these fractions in order from smallest to largest. You may
use your Fraction Cards.
4
12
2
3
6
7
9
9
1
2
4. Put
these fractions in order from smallest to largest. You may
use your Fraction Cards.
3
5
7
3
2
4
15
7
6
5
5. Put
these fractions in order from largest to smallest. You may
use your Fraction Cards.
3
12
3
5
3
3
8
9
0
2
[Type text]
6. Put
these fractions in order from largest to smallest. You may
use your Fraction Cards.
6
18
7. Find
1
2
8
8
4
7
5
8
the missing value.
b g
 4 1 8
8. Draw
a polygon with a perimeter of 24 units.
9. Draw
a polygon with an area of 10 square units.
[Type text]
10. Mr.
Stevens has $12.00 to buy as many packs of batteries as
he can. One pack of batteries cost $3.59.
a. How many packs can he buy?
b. About how much money will he spend?
c. About how much change will he get back?
11. Mr.
Johnson has $10.00 to buy as many boxes of pencils as he
can. 1 box of pencils costs $1.60.
a. How many boxes can he buy?
b. About how much money will he spend?
c. About how much change will he get back?
12. Cathy
has $11.00 to buy as many packs of balloons as she
can. One pack of balloons costs $1.02.
a. How many packs can she buy?
b. About how much money will she spend?
c. About how much change will she get back?
13. Ms.
Jones has $20 to buy as many movie tickets as she can.
[Type text]
One movie ticket costs $4.35.
a. How many tickets can she buy?
b. About how much money will she spend?
c. About how much change will she get back?
14. Explain
Angel’s mistake in the problem below.
38
 40
120
 32
152
15. Explain
58
 60
300
 48
348
Peter’s mistake in the problem below.
[Type text]
16. Explain
Cathy’s mistake in the problem below.
48
 30
120
 24
144
17. Explain
65
 50
300
 25
325
John’s mistake in the problem below.
[Type text]
18. Use
partial products or the lattice method to solve.
37  54 
19. Cecily
is decorating for a school dance. She has 62 flowers.
How many bouquets of 7 flowers can Cecily make?
[Type text]
20. a.
Explore what happens to the product when you triple a
factor.
For example, multiply 4  5. Then triple the 4 and
multiply 12  5; then triple the 5 and multiply 4  15. Show your
work.
b. Try tripling one of the factors in other multiplication facts.
Show your work. Describe a pattern you see when you triple
factors.
c. Based on your work with tripling factors, predict what will
happen when you quadruple a factor. Explain how you would
convince someone that your prediction is true for all
multiplication facts.
[Type text]
[1] 60 pounds
[2] 564
4
12
[3]
1
2
A
2
3
6
7
5
15
2
5
A
3
6
3
4
[5]
A
8
9
3
5
3
12
largest
8
8
[6]
A
7
7
A
largest
smallest
3
3
A
largest
smallest
[4]
9
9
0
2
A
smallest
5
8
largest
[7] 24
[8] Sample answer:
4
7
1
2
6
18
A
smallest
[Type text]
[9] Sample answer:
[10] a. 3 packs
b. $11.00
c. $1.00
[11] a. 6 boxes
b. $9.00
c. $1.00
[12] a. 10 packs
b. $10.00
c. $1.00
[13] a. 4 movie tickets
b. $18.00
c. $2.00
[Type text]
[14] Angel multiplied 40 times 3 instead of 40 times 30. She also multiplied 8 by 4 instead of 8
times 40.
[15] Peter multiplied 60 times 5 instead of 60 times 50. He also multiplied 8 by 6 instead of 8
times 60.
[16] Cathy multiplied 40 times 3 instead of 40 times 30. She also multiplied 8 by 3 instead of 8
times 30.
[17] John multiplied 60 times 5 instead of 60 times 50. He also multiplied 5 by 5 instead of 5
times 50.
[18] 37  54  1,998
3
7
1
1
3
5
1
9
5
2
2
9
5
8
4
8
[19] Answer: 8 bouquets
Explanation: Sample answer: 7  9  63, so 9 bouquets is too many. 7  8  56 flowers. This
leaves 6 extra.
[20] Answers will vary.