Place Value & Powers of 10 — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which expression equals 450,000?
A) 45 × 10²
B) 45 × 10³
C) 4.5 × 10⁵
D) 4.5 × 10⁴
The correct answer is C) 4.5 × 10⁵.
2. The digit 3 in which number has a value 10 times the value of the 3 in 43,600?
A) 530,000
B) 304,200
C) 93,150
D) 73,610
The correct answer is A) 530,000.
3. What is (6 × 10⁵) + (9 × 10³) + (2 × 10¹) in standard form?
A) 690,020
B) 609,020
C) 600,920
D) 609,200
The correct answer is B) 609,020.
4. If you multiply 0.037 by 10⁴, what do you get?
A) 37
B) 370
C) 3,700
D) 37,000
The correct answer is B) 370.
Part B: Fill in the Blank
Write the correct answer on each line.
1. In 7,264,500 the value of the 2 is 10,000 times the value of the 2 in 328.
The correct answer is '10,000'. In 7,264,500 the value of the 2 is 10,000 times the value of the 2 in 328.
2. 5.08 × 10³ = 5,080.
The correct answer is '5,080'. 5.08 × 10³ = 5,080.
3. 840,000 ÷ 10² = 8,400.
The correct answer is '8,400'. 840,000 ÷ 10² = 8,400.
4. Write 70,000 as a single digit times a power of 10: 7 × 10⁴.
The correct answer is '7'. Write 70,000 as a single digit times a power of 10: 7 × 10⁴.
5. A number has the digit 4 in the hundred-thousands place. Its value is 4 × 10 to the power of 5.
The correct answer is '5'. A number has the digit 4 in the hundred-thousands place. Its value is 4 × 10 to the power of 5.