SaiBook.us Fractions

Lesson Example Discussion Quiz: Class Homework

Example

Title: Fraction Subtraction with Whole number

Grade: 5-a Lesson: S2-L5

Explanation: Hello Students, time to learn examples. Let us take turns and read each example. Explain each step. Pay special attention to steps and pictures and communicate in your own words.

Examples:

Subtract \$25/4\$ and 3.

Step 1a

Convert the whole number into a fraction by taking the denominator as 1: \$3/1\$.

$1a$

Explanation: In this step, the whole number is converted into a fraction by setting the denominator as 1: \$3/1\$.

Step 1b

Make the denominator common. Since the denominator of stem [25/4] is 4, the denominator of stem [3/1] should also be 4. By multiplying the numerator and denominator of \$3/1\$ with 4, we get \$(3 × 4)/(1 × 4) = 12/4\$.

$1b$

Explanation: In this step, the denominator of \$25/4\$ is 4; we need to make the denominator of \$3/1\$ also 4. To do this, we multiply both the numerator and denominator of \$3/1\$ by 4, which gives us \$(3 × 4)/(1 × 4) = 12/4\$. So, \$3/1\$ becomes \$12/4\$.

Step 1c

Subtract the numerators: \$25/4 - 12/4 = 13/4 \$

$1c$

Explanation: Subtract the fractions numerators \$25/4\$ and \$12/4\$ and provide the result as an equation. The correct equation would be \$25/4 - 12/4 = 13/4\$.