SaiBook.us Fractions

Lesson Example Discussion Quiz: Class Homework

Example

Title: Unlike fraction Addition

Grade: 5-a Lesson: S2-L3

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:

Find the sum of \$15/8 + 25/4\$.

Step 1a

Convert unlike fractions to like fractions: \$15/8 + 25/4\$ First, to find LCM of 8 and 4 is 8.

$1a$

Explanation: In this step, we need to convert unlike fractions to like fractions. Solve \$15/8 + 25/4\$, we first need to find the LCM of 8 and 4, which is 8.

Step 1b

\$25/4\$, multiply both the numerator and denominator by 2 to make the denominator 8: \$25/4 \times 2/2 = 50/8\$

$1b$

Explanation: When multiplying \$25/4\$ by \$2/2\$ to get \$50/8\$, both the numerator and denominator were multiplied by 2 to make the denominator 8.

Step 1c

After finding a common denominator, add the numerators while keeping the denominator the same: \$15/8 + 50/8 = 65/8\$. So, \$15/8 + 50/8\$ is \$65/8\$

$1c$

Explanation: Now that both fractions have the same denominator, we can simply add their numerators while keeping the denominator the same:\$15/8 + 50/8 is 65/8\$