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MULTIPLYING GREATER NUMBERS
4TH GRADE
Review What You Know
multiple product factors round
1. One way to estimate with numbers is to ___________ each number.
2. A ____________ is the answer to a multiplication problem.
3. In the equation 9 x 5 = 45, the 9 and 5 are both ___________.
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
Multiplication
Find each product.
13 x 9 25 x 16 43 x 86
61 x 94 57 x 4 45 x 23
12 x 12 99 x 2 55 x 55
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?
How do you multiply 3-digit numbers
by 2-digit numbers?
Last month a bakery sold 389 trays
of bagels. How many bagels did the
store sell last month?
12 bagels per tray
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
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
6 1 2
x 3 2
2 4
+ 1 0
, 8 4
1 3 2
x 4 7
3 8 1
x 2 5
8 9 2
x 3 4
6 9 7
x 5 6
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 242 bags. How many
bags of popcorn did the class sell?
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?
It takes Mars 687 Earth days to revolve around the Sun. How many Earth days does it take Mars to revolve 24 times
around the Sun?
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?
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?
LakeMichigan
300MilesLong
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 totalof 208 seats.
Multiply by zeros to estimate.
Then solve.
Suppose an average of only 103 seats
are filled for each train tour. What is
a reasonable estimate for the number
of passengers the train can carry in
28 tours?
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
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
x 6 1
7 0 3
x 9 3
Jimmy orders 108 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?
A flight departs at 8:45 a.m. It arrives 2 hours and 15 minutes later. What time
does the flight arrive?
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.
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 has300 bones.
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?
What figure has eight sides and
eight angles?
What would a net look like to build this
geometric solid?
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
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
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
Fido’s dog food gives him 975 calories
of energy a day. How many calories
does he get from his food in 7 days?
Renting a boat at a marina costs $289
a day. In one month, the marina
rented boats 124 times. How much
money did they earn from the rentals?
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?
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 blocksper set
1,9 5 6
x 2 7
4, 1 5 2
x 8 3
3, 2 0 7
x 6 7
2, 3 8 4
x 7 2
3, 1 2 4
x 1 2
1, 6 2 7
x 4 1
1, 7 8 9
x 3 5
6, 1 5 3
x 2 4
Seminole leader
Osceola died in 1838.
A Florida county was
named in his
honor 49 years later.
In what year
did Osceola County get
its name?
There were 4,017 fans at the rodeo
championship. Each fan paid $5 for
admission. How much money was
collected in all?
On average, each American produces
1,657 pounds of trash in one year.
About how much trash does each
American produce in 10 years?
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?
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
In 2007, Florida’s
population was
estimated at
18,680,367. Which
digit is in the ten
millions place?
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 144letters.
Each puzzle has 15 hidden words.
If you complete 174 puzzles, how many
words will you have found?
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
Estimates show that an average family
in America uses about 350 gallons of
water per day. At this rate, how much
water would a family use in 365 days?
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?
A recycling center recycles about 1,250
aluminum cans each day. At that rate,
how many cans would be recycled
in 31 days?
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?
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?
On average, it takes
about 2,500 pearls to
decorate a gown.
If a dress shop expects
to sell 200 beaded
gowns, about how
many pearls will be
needed?
Flight 719 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 weight36 pounds per
suitcase
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?
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?
At a craft fair, Sandra sold 13 bracelets,
24 pairs of earrings, and 7 necklaces.
How much did she make in all?
Earrings @ $18
Bracelets @$15
Necklaces @ $23
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
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?
A sports store sold 536 baseball caps
during a clearance sale. The goal was
to sell at least 700 caps. How many
more caps did the store need to sell to
reach their goal?
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?
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 LITTERON SALE TODAY
Each 50 pound bag only $14
PUPPY FOODEach 10-pound bag on $19
Band members at one school
plan to practice 6 hours a week for
21 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
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?
12 + 39 or 12 x 39 or 52 + 39 or 52 x 39
Britton Hill, Florida, is the location of the highest point in the state. It is 345 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
What is the difference between the greatest and least number of eggs that
a female largemouth bass may lay?
Life Span: up to 16 years
FLORIDA LARGEMOUTH BASS
NUMBER OF EGGS
BETWEEN 2,000 AND
145,000
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
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
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
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
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
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.
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?
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?