Examples with solutions for Multiplication of Fractions: In combination with other operations

Exercise #1

34×3414= \frac{3}{4}\times\frac{3}{4}-\frac{1}{4}=

Video Solution

Step-by-Step Solution

To solve this mathematical problem, follow these steps:

  • Step 1: Multiply the fractions 34\frac{3}{4} and 34\frac{3}{4}.
  • Step 2: Subtract 14\frac{1}{4} from the product obtained in Step 1.

Let's execute each step in detail:

Step 1: Calculate the product of 34\frac{3}{4} and 34\frac{3}{4}.

To multiply two fractions, multiply their numerators and their denominators separately:

34×34=3×34×4=916 \frac{3}{4} \times \frac{3}{4} = \frac{3 \times 3}{4 \times 4} = \frac{9}{16}

Step 2: Subtract 14\frac{1}{4} from 916\frac{9}{16}.

Before we subtract 14\frac{1}{4} from 916\frac{9}{16}, we need a common denominator. The common denominator for these fractions is 16:

14=1×44×4=416 \frac{1}{4} = \frac{1 \times 4}{4 \times 4} = \frac{4}{16}

Now subtract 416\frac{4}{16} from 916\frac{9}{16}:

916416=9416=516 \frac{9}{16} - \frac{4}{16} = \frac{9 - 4}{16} = \frac{5}{16}

Therefore, the solution to the given problem is 516 \frac{5}{16} .

Answer

516 \frac{5}{16}

Exercise #2

12×12+34= \frac{1}{2}\times\frac{1}{2}+\frac{3}{4}=

Video Solution

Step-by-Step Solution

To solve 12×12+34\frac{1}{2} \times \frac{1}{2} + \frac{3}{4}, follow these steps:

  • Step 1: Multiply 12×12\frac{1}{2} \times \frac{1}{2} by using the multiplication of fractions formula:
    12×12=1×12×2=14\frac{1}{2} \times \frac{1}{2} = \frac{1 \times 1}{2 \times 2} = \frac{1}{4}.
  • Step 2: Add 14\frac{1}{4} to 34\frac{3}{4}.
    Since 14\frac{1}{4} and 34\frac{3}{4} already have the same denominator, the addition can be done directly:
    14+34=1+34=44=1\frac{1}{4} + \frac{3}{4} = \frac{1 + 3}{4} = \frac{4}{4} = 1.

Therefore, the correct solution to the expression is 1 1 .

Answer

1 1

Exercise #3

35×23+25= \frac{3}{5}\times\frac{2}{3}+\frac{2}{5}=

Video Solution

Step-by-Step Solution

To solve the problem 35×23+25 \frac{3}{5} \times \frac{2}{3} + \frac{2}{5} , we proceed with the following steps:

  • Step 1: Multiply the fractions 35\frac{3}{5} and 23\frac{2}{3}.

The multiplication yields:

35×23=3×25×3=615\frac{3}{5} \times \frac{2}{3} = \frac{3 \times 2}{5 \times 3} = \frac{6}{15}

  • Step 2: Simplify the product 615\frac{6}{15}.

Both 6 and 15 share a common factor of 3:

615=6÷315÷3=25\frac{6}{15} = \frac{6 \div 3}{15 \div 3} = \frac{2}{5}

  • Step 3: Add 25\frac{2}{5} to the simplified result 25\frac{2}{5}.

Since the fractions 25\frac{2}{5} and 25\frac{2}{5} have the same denominator, add the numerators while keeping the denominator:

25+25=2+25=45\frac{2}{5} + \frac{2}{5} = \frac{2+2}{5} = \frac{4}{5}

Therefore, the solution to the problem is 45 \frac{4}{5} .

Answer

45 \frac{4}{5}

Exercise #4

23×13+29= \frac{2}{3}\times\frac{1}{3}+\frac{2}{9}=

Video Solution

Step-by-Step Solution

To solve this problem, let's follow these steps:

  • Step 1: Multiply the fractions. Calculate 23×13 \frac{2}{3} \times \frac{1}{3} .
  • Step 2: Add the product to another fraction. Add the result to 29 \frac{2}{9} .

Now, let's work through the calculations:

Step 1: Multiply 23\frac{2}{3} by 13\frac{1}{3}.

The formula for multiplying fractions is:

ab×cd=a×cb×d \frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d} .

Substitute the values:

23×13=2×13×3=29 \frac{2}{3} \times \frac{1}{3} = \frac{2 \times 1}{3 \times 3} = \frac{2}{9} .

Step 2: Add 29\frac{2}{9} to the product.

We found in Step 1 that 23×13=29 \frac{2}{3} \times \frac{1}{3} = \frac{2}{9} .

Now add 29+29=2+29=49 \frac{2}{9} + \frac{2}{9} = \frac{2 + 2}{9} = \frac{4}{9} .

Therefore, the solution to the expression is 49 \frac{4}{9} .

Answer

49 \frac{4}{9}

Exercise #5

34×12+58= \frac{3}{4}\times\frac{1}{2}+\frac{5}{8}=

Video Solution

Step-by-Step Solution

To solve the problem 34×12+58 \frac{3}{4} \times \frac{1}{2} + \frac{5}{8} , we'll follow these steps:

  • Step 1: Multiply the fractions 34×12 \frac{3}{4} \times \frac{1}{2} .
  • Step 2: Add the result to 58 \frac{5}{8} .

Now, let's work through the steps:

Step 1: Compute the product of the first two fractions:
34×12=3×14×2=38 \frac{3}{4} \times \frac{1}{2} = \frac{3 \times 1}{4 \times 2} = \frac{3}{8}

Step 2: Add the resulting fraction to 58 \frac{5}{8} by finding a common denominator:

The fractions 38\frac{3}{8} and 58\frac{5}{8} already have the same denominator, so we can simply add them:
38+58=3+58=88=1 \frac{3}{8} + \frac{5}{8} = \frac{3 + 5}{8} = \frac{8}{8} = 1

Therefore, the solution to the problem is 1 1 .

Answer

1 1

Exercise #6

44×12+38= \frac{4}{4}\times\frac{1}{2}+\frac{3}{8}=

Video Solution

Step-by-Step Solution

To solve the expression 44×12+38 \frac{4}{4} \times \frac{1}{2} + \frac{3}{8} , follow these steps:

  • Step 1: Simplify 44 \frac{4}{4} . Since 44=1 \frac{4}{4} = 1 , the expression becomes 1×12+38 1 \times \frac{1}{2} + \frac{3}{8} .
  • Step 2: Perform the multiplication.
    Calculate 1×12=12 1 \times \frac{1}{2} = \frac{1}{2} .
  • Step 3: Add 12 \frac{1}{2} to 38 \frac{3}{8} .
    First, convert 12 \frac{1}{2} to an equivalent fraction with a denominator of 8: 12=48 \frac{1}{2} = \frac{4}{8} .
  • Step 4: Now, add the fractions: 48+38=78 \frac{4}{8} + \frac{3}{8} = \frac{7}{8} .

Thus, the final result is 78 \frac{7}{8} .

Answer

78 \frac{7}{8}

Exercise #7

23×23+49= \frac{2}{3}\times\frac{2}{3}+\frac{4}{9}=

Video Solution

Step-by-Step Solution

To solve the given problem, we will follow these steps:

  • Step 1: Perform the multiplication of the fractions.
  • Step 2: Simplify the result, if applicable.
  • Step 3: Add the simplified fractional result to the given fraction, ensuring the denominators align properly.
  • Step 4: Simplify the final result, if necessary.

Let's go through each step:

Step 1: Multiply the fractions 23×23=2×23×3=49 \frac{2}{3} \times \frac{2}{3} = \frac{2 \times 2}{3 \times 3} = \frac{4}{9} .

Step 2: The result from step 1 is 49\frac{4}{9}, which cannot be further simplified.

Step 3: Add the result from Step 2 to 49\frac{4}{9} given in the problem:
We have two fractions 49\frac{4}{9} and 49\frac{4}{9}, and since they already have a common denominator, we add them directly:
49+49=4+49=89\frac{4}{9} + \frac{4}{9} = \frac{4 + 4}{9} = \frac{8}{9}.

Step 4: The fraction 89\frac{8}{9} is already in its simplest form.

Therefore, the solution to the problem is 89 \frac{8}{9} .

Answer

89 \frac{8}{9}

Exercise #8

14×12+38= \frac{1}{4}\times\frac{1}{2}+\frac{3}{8}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Multiply the given fractions.
  • Step 2: Simplify if necessary.
  • Step 3: Perform the addition of resulting fractions.

Now, let's work through each step:

Step 1: Multiply the fractions:
14×12=1×14×2=18\frac{1}{4} \times \frac{1}{2} = \frac{1 \times 1}{4 \times 2} = \frac{1}{8}

Step 2: We find that the result is already simplified.

Step 3: Add 18 \frac{1}{8} to 38 \frac{3}{8} :
18+38=1+38=48=12\frac{1}{8} + \frac{3}{8} = \frac{1 + 3}{8} = \frac{4}{8} = \frac{1}{2}

The fractions have the same denominator, allowing for direct addition.

Therefore, the solution to the problem is 12 \frac{1}{2} .

Answer

12 \frac{1}{2}

Exercise #9

14×45+1120= \frac{1}{4}\times\frac{4}{5}+\frac{11}{20}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll approach it in the following steps:

Step 1: Perform the Multiplication
The expression begins with multiplying two fractions: 14×45 \frac{1}{4} \times \frac{4}{5} . Using the formula for multiplying fractions, we get:
1×44×5=420 \frac{1 \times 4}{4 \times 5} = \frac{4}{20}
Simplifying 420 \frac{4}{20} by dividing both numerator and denominator by 4 gives:
15 \frac{1}{5}

Step 2: Add the Result to the Second Fraction
Now, we need to add 15 \frac{1}{5} to 1120 \frac{11}{20} . To do this, we first find a common denominator.
The least common denominator between 5 and 20 is 20. Convert 15 \frac{1}{5} to twentieths:
15=420 \frac{1}{5} = \frac{4}{20}
Now add 420 \frac{4}{20} to 1120 \frac{11}{20} :
420+1120=1520 \frac{4}{20} + \frac{11}{20} = \frac{15}{20}

Step 3: Simplify the Final Result
Simplify 1520\frac{15}{20} by dividing the numerator and the denominator by 5:
15÷520÷5=34 \frac{15 \div 5}{20 \div 5} = \frac{3}{4}

Therefore, the solution to the problem is 34\frac{3}{4}. This matches choice 1, which is 34\frac{3}{4}.

Answer

34 \frac{3}{4}

Exercise #10

45×12+310= \frac{4}{5}\times\frac{1}{2}+\frac{3}{10}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Multiply the first two fractions.
  • Step 2: Add the result to the third fraction.
  • Step 3: Simplify the final result.

Now, let's work through each step:
Step 1: Multiply 45 \frac{4}{5} by 12 \frac{1}{2} . According to the multiplication rule for fractions, we have:
45×12=4×15×2=410 \frac{4}{5} \times \frac{1}{2} = \frac{4 \times 1}{5 \times 2} = \frac{4}{10} Step 2: We need to add 410 \frac{4}{10} to 310 \frac{3}{10} . Since these fractions have the same denominator, we can add them directly:
410+310=4+310=710 \frac{4}{10} + \frac{3}{10} = \frac{4 + 3}{10} = \frac{7}{10} Step 3: The sum 710 \frac{7}{10} is already in simplest form.

Therefore, the solution to the problem is 710 \frac{7}{10} , which matches choice (3) \text{(3)} .

Answer

710 \frac{7}{10}

Exercise #11

Solve the following:

35×12+310= \frac{3}{5}\times\frac{1}{2}+\frac{3}{10}=

Video Solution

Step-by-Step Solution

To solve the given expression, follow these steps:

First, multiply the fractions 35\frac{3}{5} and 12\frac{1}{2}:

35×12=3×15×2=310 \frac{3}{5} \times \frac{1}{2} = \frac{3 \times 1}{5 \times 2} = \frac{3}{10}

Now, add 310\frac{3}{10} to the result of the multiplication:

Since the fractions 310\frac{3}{10} and 310\frac{3}{10} have the same denominator, we can simply add their numerators:

310+310=3+310=610 \frac{3}{10} + \frac{3}{10} = \frac{3 + 3}{10} = \frac{6}{10}

Simplify 610\frac{6}{10} by dividing both the numerator and the denominator by their greatest common divisor, which is 2:

610=6÷210÷2=35 \frac{6}{10} = \frac{6 \div 2}{10 \div 2} = \frac{3}{5}

Therefore, the solution to the problem is 35 \frac{3}{5} .

Answer

35 \frac{3}{5}

Exercise #12

Solve the following expression:

14×(13+12)= \frac{1}{4}\times(\frac{1}{3}+\frac{1}{2})=

Video Solution

Step-by-Step Solution

According to the order of operations, we will first solve the expression in parentheses.

Note that since the denominators are not common, we will look for a number that is both divisible by 2 and 3. That is 6.

We will multiply one-third by 2 and one-half by 3, now we will get the expression:

14×(2+36)= \frac{1}{4}\times(\frac{2+3}{6})=

Let's solve the numerator of the fraction:

14×56= \frac{1}{4}\times\frac{5}{6}=

We will combine the fractions into a multiplication expression:

1×54×6=524 \frac{1\times5}{4\times6}=\frac{5}{24}

Answer

524 \frac{5}{24}