Questions and Answers
What is the product of (-15) and (-6)?
What integer, when multiplied by -18, results in 126?
What is the result of 5 × (-6) × (+7) × (-8)?
Calculate the value of (-90) ÷ (-15).
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What is the result of the expression -11 × 12 × (-7)?
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What is the value of 240 ÷ (+4)?
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What is the value of the expression $5/12 + 1/3 - 2/3 + 3/8$?
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Which of the following fractions is equal to 1?
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What is the result of $13/36 - 7/36 - 5/36$?
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Which unit of length is appropriate for representing the fraction $3/4$ on a number line?
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If OA1 equals 4 cm, what is the label of the point at OA2 if points are marked consecutively in increments of 4 cm?
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What is the final result of the expression $2/3 + 9/14 - 13/21$?
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What is the result of the sum (+212) + 86?
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How much is 0 - (-78)?
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What is the outcome of 500 - (+217)?
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What is the value of 66 - (-12)?
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How much is (-38) + (+80)?
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What is the result of multiplying -7 and -2?
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Which statement is true about the product of -5 and 6?
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What can be concluded from multiplying the integers -3 and 4?
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When multiplying -8 by -5, which of the following is correct?
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What is the absolute value of the product of -2 and -9?
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What is the result of adding 5/12 + 5/12 + 5/12?
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Which of the following represents the result of 8/15 + 3/20?
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What number should be added to 3/16 to get 1/8?
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What is the simplified result of 21/25 + 7/25 + 11/25?
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What is the result of 6/14 - 5/14?
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When simplifying 2/5 - 5/16 + 3/16, what is the final result?
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Which of the following is the result of 15/20 + 7/25?
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What number should be subtracted from 4 to get 2/13?
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What is the absolute value of -42?
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Which statement correctly compares +23 and +32?
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Which expression equals 7?
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Study Notes
Addition and Subtraction of Fractions
- To add fractions, convert them to like fractions; sum is achieved by adding numerators and keeping the common denominator.
- Shortcut formula for addition: Sum = (numerator1 × (LCM of denominators / denominator1)) + (numerator2 × (LCM of denominators / denominator2)) / LCM of denominators.
- For subtraction, use the same method but replace the sum with difference in the first formula and "+" with "-" in the second.
- Negative fractions have negative numerators; operations are consistent with positive fractions.
Operations on Given Fractions
- Examples of fraction addition and subtraction provided.
- Simplifying results of operations to ensure clarity, especially in comparison problems.
Representation of Fractions on Number Line
- Fractions can be represented on the number line by marking points proportional to their denominators.
- Initial point O represents zero; subsequent fractions are plotted using an appropriate unit length based on the denominator.
Integers and Absolute Values
- Absolute value of an integer is the number without its sign, indicating its magnitude.
- When comparing integers, a greater absolute value indicates a larger number if both are positive, and smaller if both are negative.
- Positive integers are positioned right of zero on the number line while negatives to the left.
Exercise Snippets
- Detailed exercises given, focusing on sums and differences of integers and fractions.
- Practice problems designed to reinforce concepts of absolute values and comparisons.
Multiplication and Division of Integers
- Same-sign integer multiplication yields a positive integer; absolute values remain the same.
- Different-sign integer multiplication results in a negative integer.
- Division follows similar rules as multiplication, reinforcing the significance of signs.
Application of Mathematics in Problem-Solving
- Real-life scenarios illustrated through examples like profit/loss representations and displacement.
- Exercises challenge students to engage with addition, subtraction, multiplication, and division of both integers and fractions.
Summary of Solutions and Answers
- Answers provided for various problems to clarify operations and encourage self-checking.
- Example solutions encourage understanding of core concepts in math operations and their applications.
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Description
This quiz focuses on the methods for adding and subtracting fractions, including converting to like fractions and using shortcut formulas. You'll learn how to effectively sum and subtract fractions in a clear and concise manner.
