Читать книгу Basic Math & Pre-Algebra All-in-One For Dummies (+ Chapter Quizzes Online) - Mark Zegarelli - Страница 51

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: