1. MULTIPLYING GREATER NUMBERS
4TH GRADE

2. multiple product factors round
Review What You Know
multiple product factors round
One way to estimate with numbers is to ___________ each number.
A ____________ is the answer to a multiplication problem.
In the equation 9 x 5 = 45, the 9 and 5 are both ___________.

3. Round each number to the place of the highlighted digit.
Rounding
Round each number to the place of the highlighted digit.
864
6,518
34,826
9,851
4,513,617
749,248
5,376,457
99,999
191,111,111

4. Multiplication Find each product. 13 x 9 25 x 16 43 x 86 61 x 94

5. Suzi went to a craft fair and bought 3 quilts for $45 each and 3 sun-
catchers for $12 each. How much
did she spend?

6. How do you multiply 3-digit numbers by 2-digit numbers?
Last month a bakery sold trays
of bagels. How many bagels did the
store sell last month?
12 bagels
per tray

7. Do You Know How ?
2 3 6
x 4 6
4 2 5
x 6 1
1 1 6
x 7 2
7 8 5
x 5 8
4 9 8
x 4 2
4 6 1
x 1 3

8. Do You Know How ?
7 6 3
x 1 9
5 1 5
x 3 5
6 2 9
x 4 7
1 8 5
x 5 5
2 2 7
x 8 7
9 4 6
x 4 3

9. 6 1 2
x 3 2
2 4 ,

10. 1 3 2
x 4 7
3 8 1
x 2 5
8 9 2
x 3 4
6 9 7
x 5 6

11. The Mrs. Bell’s fourth-grade class
at Orange Street Elementary sold more
bags of popcorn than any other class.
They ordered 17 cases of popcorn.
Each case had bags. How many
bags of popcorn did the class sell?

12. The Theater in Daytona Beach can seat 540 people at one time.
How many tickets can be sold if the
theater sells out every seat for one
30-day month?

13. It takes Mars 687 Earth days to revolve around the Sun
It takes Mars Earth days to revolve around the Sun. How many Earth days does it take Mars to revolve 24 times around the Sun?

14. A nursery sells plants by the flat.
There are 6 plants in each tray. Each
flat has 6 trays. The nursery sold 16
flats on Saturday and 21 flats on
Sunday. How many plants did the
nursery sell in all?

15. The length of the Nile River in Africa
is about 14 times the length of Lake
Michigan. About how many miles long
is the Nile River?
Lake
Michigan
300
Miles
Long

16. Multiply with zeros to see if your answer is reasonable.
An antique steam train makes one sight-seeing tour each day. If every seat is filled for each trip, how many passengers can it carry for 31 tours?
The Train
has a total
of 208 seats.

17. Multiply by zeros to estimate. Then solve.
Suppose an average of only seats
are filled for each train tour. What is
a reasonable estimate for the number
of passengers the train can carry in
28 tours?

18. Estimate – then solve 3 0 2 x 1 7 6 0 8 x 2 3 1 0 9 x 4 7 5 1 0 x 7 2
7 0 6
x 3 0
9 0 7
x 5 2
8 0 5
x 8 0
2 0 6
x 3 4

19. Estimate – then solve. 9 0 2 x 3 5 2 0 7 x 6 1 1 0 8 x 5 8 5 0 5 x 7 7
6 0 4
x 4 9
4 0 1
x 8 0
3 2 0
7 0 3
x 9 3

20. Jimmy orders loaves of bread each day from the bakery for his dad’s Deli. He gets a variety of white, wheat, and rye. Each loaf costs $2. How much does Jimmy spend daily for bread?

21. A flight departs at 8:45 a. m. It arrives 2 hours and 15 minutes later
A flight departs at 8:45 a.m. It arrives 2 hours and 15 minutes later. What time does the flight arrive?

22. There are 5 adult skeletons on display in an exhibit
in a science museum.
How many bones are
there in all?
An adult
has 206
bones.

23. There are more bones in a child’s body because some of a child’s bones fuse together as they grow. How many more bones are in a child’s body than in an adult’s body?
A child has
300 bones.

24. Explorers from Spain first came to Florida in 1513. After 308 years,
Spain gave up control of Florida to the
United States. In what year did this
change happen?

25. What figure has eight sides and eight angles?
What would a net look like to build this
geometric solid?

26. Find each product.
1 2 1
x 2 1 2
2 4 3
x 1 3 5
3 3 2
x 1 2 7
2 0 8
x 3 2 4
3 7 2
x 1 5 3
4 1 4
x 1 2 6
3 0 9
x 2 1 3
4 2 5
x 2 3 1

27. Construction paper comes in packs of 275 sheets. How many sheets of
construction paper are in 2 gross?
Hint: 1 gross = 12 dozen or 144

28. Lauren was captain of 168 full flights
on the J-119 last fall. How many
passengers did she have on her
flights last fall?
JETLINER
SEATS
J-056
152
J-119
247
J-211
295

29. Fido’s dog food gives him 975 calories
of energy a day. How many calories
does he get from his food in 7 days?

30. Renting a boat at a marina costs $289 a day. In one month, the marina
rented boats times. How much
money did they earn from the rentals?

31. Laura and Ryan both got new sun glasses. Laura’s sunglasses cost
$275. Ryan’s sunglasses cost $80 less.
How much did they pay for their
sunglasses all together?

32. A class is building a model of their community
A class is building a model of their community. They have 12 complete sets of building blocks. How many building blocks can the class use to build the model?
1,025 blocks
per set

33. 1,9 5 6 x
4, 1 5 2 x
3, 2 0 7 x
2, 3 8 4 x
3, 1 2 4 x
1, 6 2 7 x
1, 7 8 9 x
6, 1 5 3 x

34. Seminole leader
Osceola died in
A Florida county was
named in his
honor 49 years later.
In what year
did Osceola County get
its name?

35. There were 4,017 fans at the rodeo championship. Each fan paid $5 for
admission. How much money was
collected in all?

36. On average, each American produces 1,657 pounds of trash in one year.
About how much trash does each
American produce in 10 years?

37. Maggie walks dogs and delivers papers
to earn money. This month, she earned
$54 delivering papers and $41 walking
dogs. She spent $12 on a new watch.
How much money does
Maggie have left this month?

38. A rectangular flag has a length of 209 feet and a width of 110 feet.
What is the perimeter? P = 2L + 2W
What is the area? A = L x W

39. In 2007, Florida’s
population was
estimated at
18,680,367. Which
digit is in the ten
millions place?

40. An electronic word-search puzzle game
is programmed with 1,225 word-search
puzzles. How many letters were
needed to create all of the puzzles for
the games?
Each puzzle
uses 144
letters.

41. Each puzzle has 15 hidden words. If you complete 174 puzzles, how many
words will you have found?

42. Find each product by estimating the range.
89 x 174
80 x 100 = 8000
90 x 200 = 18000
RANGE
8000 to 18000
836 x 7,294
305 x 814
333 x 2,222
112 x 426
49 x 311
286 x 61
541 x 809

43. Estimates show that an average family
in America uses about gallons of
water per day. At this rate, how much
water would a family use in days?

44. The earth is always rotating even though
you cannot feel it. A point on the
equator travels about 1,038 miles every
hour. How far would the point travel
over 12 hours?

45. A recycling center recycles about 1,250
aluminum cans each day. At that rate,
how many cans would be recycled
in 31 days?

46. The official distance of a modern
marathon is 26 miles, plus 1,155 feet.
There are 5,280 feet in one mile.
How many feet are in a marathon?

47. Lake Okeechobee is Florida’s largest lake
Lake Okeechobee is Florida’s largest lake. A 110-mile trail loops around its shore. Melanie has biked 73 miles of the trail so far. How many miles does she have left in order to complete the whole trail?

48. On average, it takes
about 2,500 pearls to
decorate a gown.
If a dress shop expects
to sell beaded
gowns, about how
many pearls will be
needed?

49. Flight 719 carries 39 passengers. Each passenger brings 2 suitcases
Flight carries 39 passengers. Each passenger brings 2 suitcases. The airplane can safely carry 5,000 pounds of luggage. Is an exact answer needed or is an estimate enough to decide if the luggage for this flight is under the weight limit?
Average weight
36 pounds per
suitcase

50. There are 44 adults that want to take
a group tour of Mexico City. The cost
of each ticket is $12. Is an exact
answer needed or is an estimate
enough to find the total cost of the
tickets?

51. Norma bought two Tee-shirts for $14 each and a pair of shorts for $18.
She paid with a 50-dollar bill. How
much change did she get back?

52. At a craft fair, Sandra sold 13 bracelets,
24 pairs of earrings, and 7 necklaces.
How much did she make in all?
$18
Bracelets
@$15
$23

53. Andy wants to make at least $2000 at the craft fair
Andy wants to make at least $2000 at the craft fair. She sold 18 necklaces, 28 pairs of earrings, and 16 bracelets. Did she sell enough to meet her goal?
ANDY’S JEWELRY
EARRINGS
$19
BRACELETS
$17
NECKLACES
$28

54. Carla’s highest score on a video game
is 398,540 points. Connor has a high
score of 407,735 points. What is the
difference between both scores?
Is an exact answer needed or is an
estimate good enough?

55. A sports store sold 536 baseball caps
during a clearance sale. The goal was
to sell at least caps. How many
more caps did the store need to sell to
reach their goal?

56. A 10-pound bag of puppy food has about 8,130 pieces of food. How many
pieces of food are in 25 bags of
puppy food?

57. The pet store sold 28 bags of kitty litter
during the first day of the sale. How
much money did the store earn on
these bags?
KITTY LITTER
ON SALE TODAY
Each 50 pound bag only $14
PUPPY FOOD
Each 10-pound bag on $19

58. Band members at one school
plan to practice 6 hours a week for
weeks to prepare for competition.
Which equation shows how
to find how much time the band
members will practice?
20 x 10 = 200
21 x 7 = 147
21 x 6 = 126
20 x 5 = 100

59. A one-month city bus pass costs $39.
Which of the following expressions
could you use to find the cost of the
bus pass in dollars for one year?
or 12 x or or 52 x 39

60. Britton Hill, Florida, is the location of the highest point in
the state. It is feet above
sea level. About how many
sabal palms on top of each
other would equal the height
of the highest point?
TREE: SABAL PALM - AVERAGE HEIGHT IS 50 FEET

61. FLORIDA LARGEMOUTH BASS
What is the difference between the greatest and least number of eggs that a female largemouth bass may lay?
FLORIDA LARGEMOUTH BASS
NUMBER OF EGGS
BETWEEN 2,000 AND 145,000
Life Span: up to
16 years

62. If a female largemouth bass lays an
average of 4,000 eggs each year, how
many eggs might she lay in her
lifetime?
Life Span:
up to 16 years

63. Find the Product.
54 x 119
16 x 923
13 x 189
55 x 125
67 x 482
81 x 199
51 x 625
32 x 871

64. Find the Product.
34 x 108
76 x 504
47 x 302
83 x 206
55 x 604
94 x 708
68 x 409
21 x 807

65. Find the Product.
6 4 2
x 4 8 5
1 7 4
x 5 2 1
4 0 6
x 3 2 3
5 5 8
x 8 7 6

66. Find each product.
67 x 4,152
21 x 3,946
365 x 407
614 x 842
2,056 x 638
9,345 x 871
7,777 x 888
2,948 x 502

67. Tell whether an exact answer is needed or an estimate is enough.
Remember that an estimate may be all you need to solve a problem when the words “about” and “almost” are used in the question.
Tell whether an exact answer is needed or an estimate is enough.
Then solve.

68. Mrs. Hodges is making name tags for the members of the Garden Club.
She must make tags for 18 girls and
13 boys. How many name tags must
she make?

69. On Tuesday, a snack bar sold 309 big pretzels, 286 boxes of popcorn,
and 78 bags of peanuts. About how
many snacks did the snack bar sell?