Solve It 12. Find –143 · –77. Solve It 14. What is –3,375 ÷ –25? Solve It Chapter 3: Getting Down with Negative Numbers Answers to Problems in Getting Down with Negative Numbers The following are the answers to the practice questions presented in this chapter. a Using the number line, subtract the following numbers: a. 1 – 4 = –3. Start at 1, down 4. b. 3 – 7 = –4. Start at 3, down 7. c. 6 – 8 = –2. Start at 6, down 8. d. 7 – 14 = –7. Start at 7, down 14. b Find the answers to the

numbers (with their signs) to turn the problem back into subtraction: 88 – 42 = 46 d. –67 – 91 = –158. Drop the signs, add the numbers, and negate the result: 67 + 91 = 158, so –67 – 91 = –158 e. 75 – (–49) = 124. Cancel the adjacent minus signs to turn the problem into addition: 75 – (–49) = 75 + 49 = 124 f. –150 – (–79) = –71. Cancel the adjacent minus signs to turn the problem into addition: –150 – (–79) = –150 + 79 Now switch around the numbers (with their signs) to turn the problem back into

decimal 7,358.293. Q. Multiply 3.458 · 100. A. 7, 358.293 = 7, 000 + 300 + 50 + 8 + A. 345.8. The number 100 has two zeros, so to multiply by 100, move the decimal point two places to the right. Q. Divide 29.81 ÷ 10,000. A. 0.002981.The number 10,000 has four zeros, so to divide by 10,000, move the decimal point four places to the left. Q. A. 1. 2 + 9 + 3 10 100 1, 000 Simplify the decimal 0400.0600 by removing all leading and trailing zeros, without removing placeholding zeros.

the quotient, you still need to add a placeholding zero so that the decimal point appears in the correct place. Chapter 8: Getting to the Point with Decimals 19. Divide these two decimals: 9.345 ÷ 0.05 = ? Solve It 21. Solve the following divsion: 3.15 ÷ .021 = ? Solve It Perform the following decimal division, rounding to one decimal place: 6.7 ÷ 10.1. Solve It 20. 22. Find the solution, rounding to the nearest hundredth: 9.13 ÷ 4.25. Solve It Changing Decimals to Fractions Some

Chapter 1: We’ve Got Your Numbers 5. Round these two-digit numbers to the nearest ten: 6. Round these numbers to the nearest ten: a. 164 a. 29 b. 765 b. 43 c. 1,989 c. 75 d. 9,999,995 d. 95 Solve It 7. Round these numbers to the nearest hundred: Solve It 8. Round these numbers to the nearest thousand: a. 439 a. 5,280 b. 562 b. 77,777 c. 2,950 c. 1,234,567 d. 109,974 d. 1,899,999 Solve It Solve It 11 12 Part I: Back to Basics with Basic Math Using the Number Line