By Jonathan J. White, Teri Stimmel, Scott Searcy
The learn-by-doing method to grasp simple math and Pre-Algebra
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Inside youll get the perform you must examine simple arithmetic and pre-algebra, together with:
Working with Numbers
- Whole numbers
- Integers and rationals
- Powers, exponents, and roots
Notation and size
- Scientific notation
- Probability and statistics
Series and Equations
- Algebraic expressions
- Simple equations
- Clear, concise stories of each topic
- Practice difficulties in each chapterwith causes and solutions
- Diagnostic pretest to evaluate your present skills
- Full-length examination that adapts on your ability level
We take nice notesand make studying a snap
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Extra resources for Basic Math and Pre-Algebra
Add 19 + 17 + 20. answer: 56 When the sum of the digits in any single column yields a two-digit number, you must “carry” the tens digit of that result and place it above the next leftmost column of numbers: 1 19 17 + 20 56 3. Add 8423 + 279. qxd 5/20/03 9:20 AM Page 42 42 4. CliffsStudySolver Basic Math and Pre-Algebra Subtract 59 - 13. answer: 46 59 - 13 46 5. Subtract 60 - 35. answer: 25 When the top digit in a column isn’t large enough to subtract the bottom digit from it (as in this case, where you can’t take 5 away from 0), you must “borrow” from the next leftmost column, decreasing it by 1 and increasing the column you’re working with by 10: 5 1 60 - 35 25 6.
Is 126 divisible by 4? answer: No. 4. 36 ends in 6, making it divisible by 2. The number created by the last three digits is 248, which is divisible by 8. 350 is divisible by which of the following numbers: 2, 4, 5, 9? answer: 2, 5. 350 is divisible by 2 because the number ends in 0. 350 is divisible by 5 because the number ends in 0.
80 16,044 ÷ 191 ≈ 16,000 ÷ 200 = 80 617 × 68 ≈ 620 × 70 = 43,400 Divisibility Rules If you ever need to know whether one number divides evenly into another, divisibility rules can help save time. Instead of working through long division, try using the rules in Table 2-2. qxd 5/20/03 9:32 AM Page 53 53 Chapter 2: Whole Numbers Table 2-2: Divisibility Rules A number is divisible by: when: 2 it ends in 0, 2, 4, 6, or 8 (an even number). 3 the sum of its digits is divisible by 3. 4 the number created by the last two digits is divisible by 4.