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Below are some questions and answers from our archive of questions sent via e-mail by K12 students and teachers to Ask Dr. Math. You may also browse the elementary level archive by category.

- Adding Fractions
- Can you help me with this question? 1 1/2 + 4 3/2.
- Adding Improper Fractions
- 3 1/4 + 5 3/12? I've been trying this over and over again and I still don't get it!
- Common Denominators
- Why do fractions need common denominators in order to be added together?
- Mixed Numbers
- How can 7/3 be 2 and 1/3?
- Numerators and Denominators in Addition
- Why do we add numerators but not denominators when we add fractions with like denominators?
- Subtracting Improper Fractions
- What is: 3 and 4/9 - 2 and 8/7? What is: 4 and 5/3 + 3 and 6/7?
- Working with Mixed Number Fractions
- How do I subtract, add, or multiply a mixed number fraction?
- Multiplying Fractions
- I need help with problems such as this one: 3 1/4 x 3/4 = ?
- Multiplying and Adding Fractions
- How do I solve (1/3 + 2/5) x 3/4 ?
- Multiplying Fractions and a Whole Number
- How are problems like 3/5 x 4 done?
- Multiplying Unlike Fractions
- What is the fastest way to multiply unlike fractions?
- Multiplying and Dividing Mixed Fractions
- How do you divide 1 1/2 by 9/10 or multiply 8 1/4 by 2 2/3?
- Multiplying by Fractions and Decimals
- What number is 3\10 more than .025?
- What is 4/5*10?
- What is the answer to this fraction? Please explain.
- Working with Mixed Number Fractions
- How do I subtract, add, or multiply a mixed number fraction?
- Working with Mixed Numbers
- I was wondering if you could tell me the proper sequence for dividing and multiplying mixed numbers.
- Dividing 800 by 500
- A nine-year-old asks: How can I divide 800 by 500?
- Dividing by a Fraction
- Why is it that when dividing fractions you have to multiply by the reciprocal?
- Dividing Fractions
- My class would like an explanation for why you invert and multiply when dividing fractions.
- Dividing a Whole Number by a Fraction
- What are the steps to divide a whole number by a fraction?
- Fractions, Improper Fractions, Mixed Numbers
- How do you turn an improper fraction into a mixed number?
- Great question about fractions
- If 1/4 of a number equals 1/20, then what does 5/4 of this same number equal?
- Multiplying and Dividing Mixed Fractions
- How do you divide 1 1/2 by 9/10 or multiply 8 1/4 by 2 2/3?
- Two Division Questions
- There are 9 men. How many cookies would each man get if there were 113 cookies? Also, what is the answer to 1,623,341 divided by 1.632 x 2389?
- What is 12/8?
- We are studying division. What is 12/8?
- Adding, Subtracting, Multiplying, and Dividing Fractions
- I am ten years old and I don't understand lower-term fractions.
- Reducing Fractions
- What is the easiest method of reducing fractions to lowest terms?
- Rounding Numbers
- When rounding fractions, would 1/3 be considered 1/2 or 0?
- Fractions for Repeating Decimals
- Convert 3.04050505.... into a fraction...
- Reducing Fractions to Lowest Terms
- How do you bring a fraction like 5/8 to its lowest term?
- Multiplying by Fractions and Decimals
- What number is 3/10 more than .025?
- Why We need Decimals
- Why do we need decimals?
- Pi, Irrational Numbers
- What is Pi and how does it work? What are rational numbers and what are irrational numbers? How do they work
- Rational and Irrational Numbers
- What is the difference between rational and irrational numbers?

*Mara Landers*

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