Multi-digit Multiplication

Multiplication Medley

100

Find the product of 2,830 and 3.

3 X 2,830 = 8,490

200

Mrs. Federov assigned 141 assignments this past school year. If her students completed an assignment every 6 days, how many days did it take her students to complete all the assignments?

6 X 141 = 846 days

300

Which statement is true about the equation 42 – 6 = m + 9? A. The value of m is nine more than 42. B. The value of m is nine less than 42. C. The value of m is fifteen more than 42. D. The value of m is fifteen less than 42.

D. The value of m is fifteen less than 42.

400

A fourth grade class at a local elementary answered 1,209 multiplication fact problems last month. If there were a total of 4 classes, how many multiplication facts did the 4 classes answer?

4 X 1,209 = 4,836

500

Cathy volunteered to collect cans for a school project. Cathy collected 125 cans in 5 days. There were 6 volunteers, including Cathy, who each collected about the same number of cans. About how many cans did they collect? Ⓐ 135 Ⓑ 400 Ⓒ 600 Ⓓ 1200

Ⓒ 600

Creating Equations

100

Pat has 15 times as many model cars as John. John has 2 model cars. Create a multiplication equation that represents the situation.

2 X 15 = 30

200

Joan has 45 marbles. Mary has m marbles. If Joan has 15 times as many marbles as Mary, write an equation that shows how many marbles Mary has.

M X 15 = 45

300

Carl bought 7 packs of pencils. He now has 42 pencils. He writes that 42 is 6 times as many as 7. Which comparison sentence below can he use to show the comparison? A. 7 more than 6 is 42. B. 7 is 6 times as many as 42. C. 42 is 7 times as many as 6. D. 6 is 7 times as many as 42.

C. 42 is 7 times as many as 6

400

Select the statement that represents 4 x 9 = 36. A. Jordan collected 4 dimes one year and 9 dimes the next year. B. Jordan collected 4 dimes each day for 9 years. C. Jordan collected 9 dimes a day over a 4 day period. D. Jordan had a collection of 4 dimes and increased the number of dimes by 36.

C. Jordan collected 9 dimes a day over a 4 day period.

500

Andy has 12 times as many video games as Todd. Todd has 8 video games. Select the expression that shows how many games Andy has. Mark all that apply. A. 12 + 8 C. (3 x 5) x 12 E. 12 X (4X2) B. 12 + (4 x 2 ) D. 12(8) F. (3 + 5) x 12

D. 12(8) E. E. 12 X (4X2) F. (3 + 5) x 12

Expanded/Partial Products

100

There is a plant sale at schools. The price for each plant is $7. Which expression can be used to show how much money the school will make if it sells 325 plants? Complete the equation given and solve. (7 X ___) + (7 X ___) + (7 X ___)

(7 X 300) + (7 X 20) + (7 X 5)= 2,275

200

What are the partial products for 321 x 45?

321 x 5 = 1605

321 x 40 = 12,840

300

What are the partial products of 40 x 16? total product?

 40 x 6 = 240

40 x 10 = 400

240+400 = 640

400

Chester wanted to find the product of 3,840 and 15. What are the partial products that he would get?

5 X 3,840 = 19,200

3840 x 10 = 38400

19,200+38,400 = 57,600

500

Select the expressions that have a product of 667.Select all that apply. Ⓐ(23× 20) + (23× 9) Ⓑ(23× 20) + (23× 2)+ (23× 20)+ (23× 9) Ⓒ(20× 29) + (3× 20)+ (3× 9) Ⓓ(23× 20) + (23× 3) Ⓔ(20× 20) + (20× 9)+ (3× 20)+ (3× 9)

*Ⓐ(23× 20) + (23× 9)  *Ⓒ(20× 29) + (3× 20)+ (3× 9)  

2 digit multiplication

100

Maria packed 24 bags of dog treats for the animal shelter. She put 16 dog treats in each bag. What is the total number of dog treats Maria packed?

24 X 16 = 384

200

Mr. Dumars needs to order construction paper for his fourth grade class. He purchases 12 packs of construction paper. Each pack of construction paper has 48 pieces of paper. How many pieces of construction paper did Mr. Dumars order?

576

300

Fernando and Roger are both in an art class. Fernando has created 32 projects in are class this year. Fernando has created twelve times as many as projects as Roger. Create a multiplication equation that represents the situation. Then, solve how many projects has Roger created this year in art class?

12 X 32= 384

400

The school principal orders 6 new chalkboards for each grade. There are 3 grades in the school. Each new chalkboard cost $98. What is the total cost for the new chalkboards? Explain how you found your answer .

Step 1 : Find out how many chalkboards were ordered. 3 X 6 = 18 Step 2: Find the total cost 18 X 98= 1, 764

500

Bill and Alyssa helped pack books to donate to a charity. Bill packed 28 boxes with 30 books in each box. Alyssa packed 31 boxes with 25 books in each box. How many more books did Bill pack? Show your work

Step 1 : Solve for each Bill: 28 x 30= 840 Alyssa: 31 x 25 = 775 Step 2: Find the difference 840-775 = 65

Factors/Multiples

100

What are the next 4 multiples of 8?

8, ...16,24,32,40

200

What is a definition of a factor?

Factors are numbers you can multiply together to get another number: •Example: 2 and 3 are factors of 6, because 2 × 3 = 6

300

What are all the possible factors of 24?

The factors of 24 are: 1,2,3,4,6,8,12,24 1 X 24 2 X 12 3 X 8 4 x 6

400

Marissa was decorating her room. She arranged 63 picture tiles on a wall in the shape of a rectangle. Which is a possible arrangement of the picture tiles? Select all that apply. Ⓐ 7 rows of 7 tiles Ⓓ 21 rows of 3 tiles Ⓑ 9 rows of 7 tiles Ⓔ 22 rows of 6 tiles Ⓒ 7 rows of 9 tiles

Ⓓ 21 rows of 3 tiles Ⓑ 9 rows of 7 tiles Ⓒ 7 rows of 9 tiles

500

The number 12 is ____________ (prime, composite) because it has _________ (more, less) two factors.

The number 12 is ( composite) because it has (more) two factors.