ADDITION OF FRACTION gkjvjbjyhbjkjl.pptx

math lesson

1. 1 st CLASSROOM OBSERVATION SPEILBERG C. LUMBAY, T-I

2. Find + =   Solution + =   Explore and Discover! The Supreme Student Government (SSG) of School was able to collect kg of plastic bottles and kg of disposable spoons and forks. How many kilograms of items did the students collect in all? In collecting the recyclable materials we need cooperation? Yes or No? * What recyclable items did they collect? * What does the problem ask for? * How will you solve the problem?  

3. ADDITION OF FRACTION MATHEMATICS 7

4. OBSERVE THE FOLLOWING: + = + = + = = 2  

5. ADDITION OF FRACTIONS SIMILAR FRACTION , , and , , same denominator DISSIMILAR FRACTION different denominator MIXED NUMBER 3 and Whole number with fraction.  

6. Adding Similar Fraction Similar fractions are fractions that have the same denominator. , , and , , same denominator Take note that fractions can be added only when these fractions are similar fractions. To add like fractions (fractions with the same denominator) add the numerators and write the sum over the denominator. If a, b and c denote integers, and b ≠ 0, then  

7. Examples 1. 2.  

8. Adding Dissimilar Fractions Dissimilar fractions are fractions with different denominators. Below are examples of dissimilar fractions . different denominator Dissimilar fractions cannot be added directly . First, you need to convert dissimilar fractions to similar fractions.  

9. Steps in Adding Fractions With different denominators, and , where b ≠ 0 and d ≠ 0, Rename the fractions to make them similar which denominator is the least common multiple of b and d. Add the numerators of the resulting fractions. Write the result as a fraction whose numerator is the sum of the numerators and which denominator is the least common multiple of b and d.  

10. E xamples _______   LCM of 5 and 4 is 20. The LCD is 20 .   _______   LCM of 3 and 4 is 12. The LCD is 12 .  

11. Adding Mixed Numbers Mixed Numbers are quantities that have a whole number part and a fraction part. Below are examples of mixed fractions. 3 and Steps in Adding Mixed Numbers Find the LCD of the fractions in the mixed numbers to make them similar fractions. Add the whole numbers and the similar fractions. Simplify if the resulting fraction is improper fraction.  

12. Examples 2 + 1 = ________   7 + 1 = ________  

13. EVALUATION Solve the following equations. Express your answer in simplest form 1 . 2/9 + 3/9 = _______ 6 . 7/9 + 1/9 = _______ 2 . 5/11 + 4/11 = _______ 7. 16/24 + 6/12 = _______ 3 . 7/20 + 3/8 = _______ 8. 4/9 + 1/4 = _______ 4 . 2/5 + 7/10 = _______ 9 . 25/12 + 1/3 = _______ 5 . 8/14 + 2/7 = _______ 10. 9/57 + 3/27 = _______

14. ASSIGNMENT Jay was making cookies. He mixed 2 cups of flour, 1 cups of sugar and cup of brown sugar together in a bowl. How many cups of ingredients did he have altogether?