Unit 6 Math Review

Which of these are equivalent to 6.8 x 10³? Select TWO choices

• A. 6.8 x 10 x 3

• B. 6.8 x 10 x 10 x 10

• C. 680

• D. 6,800

• E. 68,000

Knowing that 8.4 x 10² = 840, what is 8.4 x 10⁴?

• A. 840

• B. 8,400

• C. 84,000

• D. 840,000

According to her step-counter, Juanita walked 1.6 x 10⁴ steps yesterday. How many steps did Juanita walk yesterday?

• A. 16 steps

• B. 160 steps

• C. 1,600 steps

• D. 16,000 steps

Zara knows that 23 x 0.86 = 19.78. What is 2.3 x 8.6?

• A. 1.978

• B. 19.78

• C. 197.8

• D. 1,978

A rectangular card measures 6.2 inches long by 4.8 inches wide. Which is the best estimate for the area of the card?

• A. About 11 square inches

• B. About 20 square inches

• C. About 30 square inches

• D. About 50 square inches

Which statement correctly describes what happens when you multiply 0.654 x 10³?

• A. The digit 6 moves to the ones place.

• B. The digit 6 moves to the hundreds place.

• C. The digit 6 moves to the tens place.

• D. The digit 6 moves to the thousands place.

The new company had a first-year gross sales of $280,000.00. What is another way that the company’s gross sales can be written?

• A. 2.8 x 10^3

• B. 2.8 x 10^4

• C. 2.8 x 10^5

• D. 2.8 x 10^6

A sandwich shop uses 0.14 pounds of tomato on each sandwich. Which decimal grid shows how much tomato the shop needs to make 6 sandwiches?

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What is the value of the 7 when 73.1 is multiplied by 10²?

• A. 7 hundred

• B. 7 thousand

• C. 7 hundredths

• D. 7 thousandths

Yusef walks 0.7 kilometers to the park. He walks to the park 48 times this year. How many kilometers does Yusef walk to the park this year?

• A. 33.6 kilometers

• B. 48.7 kilometers

• C. 47.3 kilometers

• D. 68.6 kilometers