Solve Mixed Number Multiplication: 3⁴⁄₅ × 2½

345×212= 3\frac{4}{5}\times2\frac{1}{2}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Convert mixed fractions to fractions
00:31 Calculate the numerators
00:43 Make sure to multiply numerator by numerator and denominator by denominator
00:50 Calculate the products
00:57 Now convert to mixed fraction
01:00 Break down 95 into 90 plus 5
01:03 Break down the fraction into whole number and remainder
01:15 Convert proper fraction to whole number and add to mixed number
01:21 Reduce what's possible
01:32 And this is the solution to the problem

Step-by-step written solution

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1

Understand the problem

345×212= 3\frac{4}{5}\times2\frac{1}{2}=

2

Step-by-step solution

To solve the problem, we'll use the following steps:

  • Step 1: Convert both mixed numbers into improper fractions.

  • Step 2: Multiply the improper fractions.

  • Step 3: Convert the product back to a mixed number.

Now, let’s work through each step:

Step 1: Convert 3453\frac{4}{5} and 2122\frac{1}{2} into improper fractions.
For 3453\frac{4}{5}: Multiply the whole number 3 by the denominator 5, and add the numerator 4:
3×5+4=15+4=193 \times 5 + 4 = 15 + 4 = 19.
The improper fraction is 195\frac{19}{5}.
For 2122\frac{1}{2}: Multiply the whole number 2 by the denominator 2, and add the numerator 1:
2×2+1=4+1=52 \times 2 + 1 = 4 + 1 = 5.
The improper fraction is 52\frac{5}{2}.

Step 2: Multiply the improper fractions.
195×52=19×55×2=9510\frac{19}{5} \times \frac{5}{2} = \frac{19 \times 5}{5 \times 2} = \frac{95}{10}.

Step 3: Simplify 9510\frac{95}{10} and convert to a mixed number.
Divide 95 by 10. The quotient is 9 with a remainder of 5, so:
9510=9510\frac{95}{10} = 9\frac{5}{10}.
Since 510\frac{5}{10} simplifies to 12\frac{1}{2}, we get:
9129\frac{1}{2} as the final answer.

Therefore, the solution to the problem is 9129\frac{1}{2}.

3

Final Answer

912 9\frac{1}{2}

Practice Quiz

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\( 1\frac{4}{5}\times1\frac{1}{3}= \)

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