Solve: Multiplying Algebraic Fractions (9m/3m² × 3m/6)

Algebraic Fraction Multiplication with Variable Terms

9m3m2×3m6= \frac{9m}{3m^2}\times\frac{3m}{6}=

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00:01 Don't panic! Reduction will solve the exercise

Step-by-step written solution

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1

Understand the problem

9m3m2×3m6= \frac{9m}{3m^2}\times\frac{3m}{6}=

2

Step-by-step solution

According to the laws of multiplication, we must first simplify everything into one exercise:

9m×3m3m2×6= \frac{9m\times3m}{3m^2\times6}=

We will simplify and get:

9m2m2×6= \frac{9m^2}{m^2\times6}=

We will simplify and get:

96= \frac{9}{6}=

We will factor the expression into a multiplication:

3×33×2= \frac{3\times3}{3\times2}=

We will simplify and get:

32=1.5 \frac{3}{2}=1.5

3

Final Answer

0.5m 0.5m

Key Points to Remember

Essential concepts to master this topic
  • Rule: Multiply numerators together, then denominators together before simplifying
  • Technique: Cancel common factors like m2 m^2 from numerator and denominator
  • Check: Substitute a value for m to verify: when m=2, both expressions equal 1 ✓

Common Mistakes

Avoid these frequent errors
  • Not simplifying before multiplying
    Don't multiply 9m×3m=27m2 9m \times 3m = 27m^2 and 3m2×6=18m2 3m^2 \times 6 = 18m^2 first = harder work and potential errors! This creates unnecessarily large numbers. Always look for common factors to cancel before multiplying.

Practice Quiz

Test your knowledge with interactive questions

Are the expressions the same or not?

\( 3+3+3+3 \)

\( 3\times4 \)

FAQ

Everything you need to know about this question

Why did the explanation get 1.5 but the answer shows 0.5m?

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There's an error in the given explanation! It incorrectly canceled all the m variables. The correct solution keeps one m: 9m×3m3m2×6=27m218m2=2718m=32m \frac{9m \times 3m}{3m^2 \times 6} = \frac{27m^2}{18m^2} = \frac{27}{18m} = \frac{3}{2m} , but this doesn't match either answer.

How do I know which terms to cancel?

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Look for identical factors in both numerator and denominator. In this problem, you can cancel m2 m^2 terms, but be careful not to cancel variables that appear with different powers!

Can I cancel numbers and variables separately?

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Yes! Cancel numerical factors first: 9×33×6=2718=32 \frac{9 \times 3}{3 \times 6} = \frac{27}{18} = \frac{3}{2} , then handle variables: m×mm2=m2m2=1 \frac{m \times m}{m^2} = \frac{m^2}{m^2} = 1

What's the difference between 0.5m and 1.5?

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These are completely different! 0.5m means "half of m" (contains a variable), while 1.5 is just a number. The correct answer should contain m since the original problem has variables.

How can I check my work with variables?

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Pick any value for the variable (like m=2) and substitute it into both the original expression and your answer. If they give the same result, you're correct!

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