tailieunhanh - Success step english 2

Tham khảo tài liệu 'success step english 2', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CBEST MINI-COURSE Answer There are two requirements for the unknown number The tens digit has to be four more than the ones digit and the two digits have to add up to 10. The best way to solve the problem is to eliminate answers that don t meet these two requirements. Consider the second criterion first. A glance at the answers shows that the digits in the answers a and c do not add up to 10. They can be eliminated. Next consider the first requirement. Answer b contains a tens digit that is six not four more than the ones digit. Answer d has the ones digit four more than the tens reversing the requirement. Therefore e is the only number that correctly meets the requirements. Practice with Definitions Match the word on the left with the description or example on the right. You may want to write these definitions on flash cards. __ 3. integer a. b. . 3 2 1 1 2 3 . 4. whole number c. 0 1 2 3 . 5. zero d. number set includ- 6. negative integer e. ing fractions . . . 3 2 1 0 1 7. positive integer 2 3 . . . __ 8. digit f. neither negative nor positive __ 9. _ 10. g. one numeral in a number h. greater than _11. i. less than _12. j. greater than or equal to 13. real number k. less than or equal to Answers 3. e. 9. i. 4. c. 10. h. 5. f. 11. k. 6. a. 12. j. 7. b. 13. d. 8. g. Math 2 Numbers Working Together In the last lesson you learned the definitions of several mathematical terms. This lesson will discuss ways in which numbers work together. You will need this information to solve simple algebra and perform certain arithmetic functions that will be part of some CBEST problems. Adding and Subtracting Integers The following sample questions are examples of the types of problems about adding and subtracting you may see on the CBEST. The answers are given later in this lesson. Sample Integer Questions 1. Every month Alice s paycheck of 1 500 goes directly into her bank account. Each month Alice pays 800 on her mortgage payment and 500 for food and all other monthly expenses.