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The strategy for rounding numbers typically involves identifying the target place value or significant figure to which the number should be rounded. Here is a step-by-step strategy for rounding numbers:

1. Identify the target place value or significant figure: Determine the digit or position to which you want to round the number. For example, if you want to round to the nearest whole number, the target place value is the units place. If you want to round to the nearest tenth, the target place value is the first decimal place.

2. Look at the digit to the right of the target place value: Examine the digit immediately to the right of the target place value. This digit will help you determine whether you need to round up or down.

3. Decide whether to round up or down: If the digit to the right of the target place value is 5 or greater, you round up. If it is less than 5, you round down. If the digit is exactly 5, you may need to use tie-breaking rules, such as rounding to the nearest even number (banker's rounding).

4. Change the digits to the right of the target place value to zero: After deciding whether to round up or down, change all the digits to the right of the target place value to zero. This means dropping those digits from the number.

5. Adjust the target place value if necessary: If you rounded up and the target place value becomes 10 (or 100, 1000, etc.), carry over the excess value to the next higher place value.

6. Write the rounded number: Finally, write the rounded number with the appropriate digits and place values based on the rounding decision made.

It's important to note that different rounding conventions may exist depending on the specific context or rules being followed. It's advisable to follow any specific rounding instructions or guidelines provided in a particular setting or mathematical context.

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Prealgebra is a foundational level of mathematics that serves as a bridge between arithmetic and algebra. It covers several topics that provide the necessary skills and knowledge for understanding and solving more complex mathematical problems. Here is a list of some common topics covered in prealgebra:

1. Number Systems:
Whole numbers
Integers
Fractions
Decimals
Percentages

2. Basic Operations:
Addition, subtraction, multiplication, and division of numbers
Order of operations (PEMDAS/BODMAS)
Properties of numbers (commutative, associative, distributive)

3. Variables and Expressions:
Introduction to variables
Evaluating expressions
Simplifying expressions
Translating word problems into algebraic expressions

4. Equations and Inequalities:
Solving one-step and two-step equations
Solving inequalities and graphing them on a number line
Solving equations and inequalities involving absolute values

5. Factors and Multiples:
Prime and composite numbers
Finding factors and multiples
Greatest common factor (GCF) and least common multiple (LCM)

6. Ratios, Proportions, and Percents:
Understanding ratios and proportions
Solving proportion problems
Solving percent problems

7. Geometry:
Basic geometric shapes (lines, angles, triangles, quadrilaterals)
Perimeter and area of squares, rectangles, and triangles
Circles and their properties

8. Data and Statistics:
Organizing and interpreting data
Mean, median, and mode
Probability and basic counting principles

9. Introduction to Graphing:
Cartesian coordinate system
Plotting points on a coordinate plane
Graphing linear equations