Go Math//Chapter 3//Mid-Chapter Checkpoint

Go Math//Chapter 3//Mid-Chapter Checkpoint

Show me what you've learned so far...

Multiplying by Tens

• Multiply the basic fact

• add the zeros

• Example 1: 80 x 40 >> 8 x 4 = 32, so 80 x 40 = 3,200

• Example 2: 14 x 60>> 14 x 6 = 84, so 14 x 60 = 840

Multiple Choice

What is the product of 80 and 50?

• 40

• 400

• 4,000

• 40,000

Multiple Choice

What is the basic fact in 4 x 30?

• 4

• 30

• 4 x 3 = 12

• 4 x 30

Multiple Select

Select all the expressions that have a value of 2,400.

• 600 x 40

• 30 x 80

• 40 x 60

• 12 x 200

Estimating Products

• Round both factors

• multiply using the basic fact

• don't forget to add the zeroes

• 
  

Multiple Choice

What is the first step in estimating 56 × 27?

• multiply

• round both factors

• find the product

• use expanded form

Multiple Choice

Raven saves $1 each week, which is $52 per year. About how much will she have saved in 15 years?

• $780

• $52

• $15

• $1,000

Multiple Choice

Ms. Mackey’s class is taking a field trip to the zoo. The trip will cost $26 for each student. There are 22 students in her class. What is a good estimate for the cost of the students’ field trip?

• 400

• 572

• 600

• 550

Area Models

• draw your rectangle/array

• break each factor into tens and ones

• find the area of each smaller rectangle

• add all four of the areas (the partial products)

Fill in the Blanks

Multiple Choice

What equation is represented in box A?

• 10 x 10

• 10 x 30

• 10 x 9

• 30 x 2

Multiple Choice

The area model represents 43 X 56.

Which answer shows all the correct partial products?

• 20 + 24 + 150 + 18

• 200 + 240 + 150 + 18

• 2000 + 240 + 150 + 18

• 2000 + 240 + 15 + 18

Multiple Choice

The area model represents 23 X 47.

Which answer shows all the correct partial products?

• 800 + 140 + 12 + 21

• 800 + 140 + 120 + 21

• 80 + 140 + 120 + 21

• 800 + 14 + 120 + 21

Multiple Choice

What equation represents the blue box?

• 40 x 50

• 50 x 3

• 2000 + 240 + 150 + 18

• 6 x 3

Partials Products

• multiply yhe tens by the tens

• then the tens by the ones

• then the ones by the tens

• then the ones by the ones

• add the partial products

Multiple Select

Select all of the partial products for 13 x 32?

• 300

• 20

• 90

• 6

• 30

Multiple Choice

What are the 4 partial products of 22 x 15? Draw an area model to help.

• 30 + 15 + 22 + 10

• 20 + 10 + 1 + 2

• 200 + 100 + 20 + 10

• 200 + 20 + 25 + 10

Multiple Choice

When completing an area model, what technique is used with the factors?

• Using expanded form

• Find the partial quotients

• Calculating the product

• Subtracting

Open Ended

Do you feel smarter knowing different ways to multiply?