Chapter 1: Whole Numbers and the Four Operations

Place Value

100

Write in standard form: Eight million, forty three thousand, fifty-one

8,043,051

200

Write in expanded form: two million, five thousand, seventy-six

2,000,000 + 5,000 + 70 + 6

300

40,000,000 + 700,000 + 5,000 + 400 + 20 = ?

40,705,420

400

What is the value of the 7 in 67,432,156

seven million

500

Write in word form: 2,345,678

Two million, three hundred forty-five thousand, six hundred seventy-eight

Multiples of 10

100

34 x 10 = ? 

340

200

400 x 60 = ? 

24,000

300

5,500 divided by 100

55

400

40 x 10²

4,000

500

6,340 x 10³

6,340,000

Four Operations

100

1,456 + 999

2,455

200

5,034 - 925

4,109

300

5,123 x 21

107,583

400

6,860 divided by 20

343

500

2,135 divided by 41

52 R 3

Order of Operations

100

6 × 5 ÷ 2  = ? 

15

200

(35 – 11) × 2 = ? 

48

300

80 × 40 ÷ 10 ÷ 2 = ?

160

400

(37+ 53) – 12 × 5 = ? 

30

500

(13 + 2 ) x (10 + 3 ) - 7^{2 = ?}

146

Real World Problems

100

There are 5,400 cars in a parking lot. There are 600 cars in each section. How many sections are there? 

There are 9 sections of cars in the parking lot. 

200

A doctor's office orders 12 boxes of surgical masks each month. Each box contains 420 masks. How many surgical masks are ordered in 10 months? 

The doctor's office orders 50,400 surgical masks in 10 months. 

300

There were 1,056 red chairs and green chairs in all in an auditorium. The green chairs were arranged in 32 rows with 15 chairs in each row. The red chairs were arranged in rows of 16. How many rows of red chairs were there?

There were 36 rows of red chairs. 

400

   

A company manager ordered a field day T-shirt for each of his 1,248 employees.

The cost of each T-shirt was $14.

Mia finds the total cost of the T-shirts as shown.

      1,248

   ×     14

   --------

      4,992

   +  1,248

   --------

      6,240

The total cost of the T-shirts is $6,240.

• What is Mia’s mistake?

• What is the correct total cost of the T-shirts?

Mia’s mistake: She forgot to move the second partial product one place to the left when multiplying by the 1 in the tens place. The 1 represents 10, not 1. 

Step 1: Multiply by the ones digit.

1,248 × 4 = 4,992

Step 2: Multiply by the tens digit.

1,248 × 10 = 12,480

Step 3: Add the partial products.

4,992+12,480=17,472

500

What is the 7-digit secret code? Use the following clues to solve it:

• All seven digits are different.
• The digit in the hundred thousands place is 6.
• The digit in the hundreds place is 8.
• The digit in the thousands place is 5 more than the digit in the millions place.
• The digit in the tens place is 3 less than the digit in the thousands place.
• The digit in the ones place is 4 less than the digit in the ten thousands place.
• The code starts with the digit 2.
• 
  

2,657,841