algebra
X tens/hund/thou
distrib. prop.
mental math
& 2 digit x 1 digit
Multiply with regrouping
100

Write a comparison sentence.

6 x 3 = 18

____ times ___ as many as ___ is ___.

6 times as many as 3 is 18.

100

4 x 5 = ___

4 x 50 = ___

4 x 500 = ___

4 x 5,000 = ___

20

200

2,000

20,000

100

4 x 14 = 

4 x 14 = 

4 x 10 = 40

4 x 4 =   16

40 + 16 = 56

100

Find the product.

8 x 604 = _____


8 x 604 = ____

8 x 600 = 4,800

8 x 4    =      32

            = 4,832  

100

1,439

   x  7


1,439x 7 = 10,073

200

Write a comparison sentence.

24 is 4 times as many as 6.


24 = 4 x 6

200

7 x 800 = ____

3 x 70 = ____

8 x 6,000 = ______

5,600

210

48,000

200

The model shows the flowers Jim planted in his garden.  How many flowers did Jim plant?

3 x 10 = 30

3 x  5  = 15

30 + 15 = 45 flowers

200

Find the product.

At a high school gym, the bleachers are divided into 6 sections.  Each section can seat 295 people.  How many people can be seated in the gym?

6 x 295 = ____

(6 x 300) = 1,800

(6 x 5)     =.   -30

               = 1,770 people

200

9,600

    x 6

9,600 

    x 6

57,600

300

There are 27 campers.  This is nine times as many as the number of counselors.  How many counselors are there?


27 = 9 x 3 

3 counselors

300

An airplane is traveling at a speed of 400 miles per hour.  How far will the plane travel in 5 hours?


5 x 400 = 2,000 miles

300

Use expanded form to solve:

6 x 532 = ______

(6 x 500) + (6 x 30) + (6 x 2) = _____

3,000 + 180 + 12 = 3,192


300

MULTISTEP Problem:

At a tree farm there are 7 rows of 35 oak trees.  In each row of oak trees 15 are red oaks.  How many are NOT red oak trees?


7 x 35 =  245

7 x 15 =  105

245-105 = 140 oak trees

300

It took me 1,492 steps to walk around the track once.  If I walked around the track 4 times, how many steps did I take?

1,492 x 4 = 5,968 steps

400

Sari has 3 times as many pencils erasers as Sam.  together they have 28 erasers.  How many erasers does Sari have?

Sari __  __ __

Sam__

4 x n = 28.         Do step two:  __ x __ = __


3 x 7 = 21 erasers

400

Estimate and multiply.

9 x 54 = _____

8 x 783 = _____

4 x 7,192 = _____

9 x 50 = 450

8 x 800 = 6,400

4 x 7,000 = 28,000

400

Use expanded to solve:

There are 5,280 feet in a mile.  If I walk 4 miles, how many feet is this?


4 x 5,280 = ______

(4 x 5,000) + (4 x 200) + (4 x 80) = _____

20,000 + 800 + 320 = _____

21,120

400

Estimate and multiply with regrouping.

Estimate:_______

$83

 x 5


Estimate:  $80 x 5 = $400

$83 x 5 = $415

400

2,792 x 7 = ______

2,792 x 7 = 19,544

500

Bill counted a total of 40 white cars and yellow cars.  There were 9 times as many white cars as yellow cars.  How many white cars did Rafael count?

white __ __ __ __ __ __ __ __ __

blue   __ 

10 x n = 40.      Complete the problem.

9 x 4 = 36 white cars

500

A theater has 4,650 seats.  If a theater sells all the tickets for each of its 5 shows, ABOUT how many tickets will the theater sell?

5,000 x 5 = 25,000 tickets

500

Multiply using partial product.

$149 x 5 =

Write vertically and solve.

$500

  200

+ 45

$745

500

When vacationing on an island we drove across the Seven Mile Bridge 28 times.  How many miles did I drive crossing the bridge?


7 x 28 =

196 miles

500

Use the Order of Operations to solve the value of n?

4 x 23 + 3 x 48 - 23 = _____

(4 x 23) + (3 x 48) - 23

     92   +      144   - 23 = 213

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