Mark Zegarelli - Basic Math & Pre-Algebra All-in-One For Dummies (+ Chapter Quizzes Online)

(d) 40,000.

3

(a) 7,000.

(b) 9,000.

(c) 23,000.

(d) 800,000.

4

(a) 5,000,000.

(b) 11,000,000.

(c) 99,000,000.

(d) 5,556,000,000.

5 280. . The answer before rounding? It’s 285!

6 5,500. . The answer before rounding is 5,578.

7 1,400. . The answer before rounding: 1,507.

8 7,000. . The answer before rounding? It’s 6,836!

In the section that follows, you’ll find a quiz that tests your rounding and estimating skills from this chapter.

Answer these 12 questions to test the skills you learned in this chapter. When you’re done, flip to the next section for answers and explanations.

1 Which digit is in the ten-thousands place of the number 34,921,706,488?

2 Which digit is in the hundred-thousands place of the number 987,654,321,000?

3 Which digit is in the millions place of the number 7,261,945,803?

4 Round the number 875,921 to the nearest hundred.

5 Round the number 875,921 to the nearest thousand.

6 Round the number 805,921 to the nearest hundred-thousand.

7 Round the number 805,921 to the nearest million.

8 Round the number 55,555 to the nearest ten.

9 Estimate the sum by rounding each number to the nearest ten before adding:

10 Estimate the sum by rounding each number to the nearest hundred before adding:

11 Estimate the result by rounding each number to the nearest ten before adding and subtracting:

12 Estimate the result by rounding each number to the nearest million before adding and subtracting:

1 0.Ten-thousands place: 34,921,7 06,488?

2 3.Hundred-thousands place: 987,654, 321,000?

3 1.Millions place: 7,26 1,945,803?

4 875,900.

5 876,000.

6 800,000.

7 1,000,000.Add a leading 0 to the beginning of the number, in the millions place.

8 555,560.

9 1,880. . What is the sum if you don’t round? It’s 1,877!

10 1,900.

11 290. . The answer before rounding? It’s 291!

12 193,000,000. . The answer before rounding is 192,821,521.