Adding / subtracting dissimilar fractions
- 1. Demonstration Lesson Plan in Math IV I. Objectives: A. Perform operation of addition or subtraction of dissimilar fractions. B. Analyzes and solve word problem involving addition or subtraction of dissimilar fractions. C. Work cooperatively with the group and class activities. II. Adding and or Subtracting Dissimilar Fractions Mathematics IV LM pp. 127 - 129 Teachers Guide pp. 157 - 159 K to 12 CG M4NS-IIg-83 laptop, LCD projector, flash cards, cartolina III. Activities A. Preparatory Activities 1. Drill Identify similar or dissimilar fractions. 3/4 2/3 1/5 1/2 2/6 2/3 3/7 4/7 5/7 5/9 1/9 2/9 1/10 6/10 8/10 2. Review Adds or Subtracts similar fractions. 2/5 + 3/5 = 2/6 + 1/6 = 7/8 - 2/8 = 9/10 - 4/10 = 10/12 - 6/12 = B. Developmental Activities 1. Motivation Song : Math Dali (downloaded video) 2. Presentation Ask: Can we add or subtract dissimilar fractions? How can we add or subtract dissimilar fractions? 3. Discussion Let the pupils watch downloaded video of math dali episode Adding or Subtracting Dissimilar Fractions. 4. Activity Perform the indicated operation. 2/3 + 3/5 = 2/6 + 1/3 = 7/8 - 2/4 = 9/10 - 4/5 = 10/12 - 3/6 = 5. Generalization How can we add or subtract dissimilar fractions? 6. Application Read, analyze then solve. 1. Marie shared 1/4 slice of a cake to her friend. Her sister shared 3/8 slice of a cake with her friends. How many slices of cakes did they share altogether? 2. Lando cut a bamboo stick which was 5/6 metre long. He used 他 metre for a garden peg. How many metre of bamboo stick was left?
- 2. IV. Evaluation A. Solve for N. 1. 3/4 + 1/3 = N 2. 4/5 - 2/3 = N B. Read, analyze then solve. 3. Tootsie spent 3/10 of an hour sweeping the yard and 2/5 of an hour watering the plants. How long did she work? 4. Aling Mila cooked 8/10 kilogram of spaghetti. She gave 2/5 kilogram to her neighbors. How much spaghetti was left for her children? V. Agreement Do Get Moving on Math LM pp. 129 - 130. Wilson S. Parayaoan Teacher III