Guro Ako - Teacher Talks



Lesson 37- Creating Problems (with reasonable answers)Involving Addition and Subtraction of Decimal Numbers Including Money Second Grading Period, Week 3ObjectiveValue Focus: Accepting social responsibilitiesCreate Problems (with reasonable answers)Involving Addition and Subtraction of Decimal Numbers Including Money Prerequisite concepts and skills: Basic addition and subtraction factsBasic concepts of addition and subtraction of decimals and steps in problem solvingMaterials: flash cards, chart of word problems, activity cardsReferences: M5NS-IIc-109.1, Instructional ProceduresPreliminary ActivitiesDrillHave a drill on solving problems involving addition and subtraction of decimals using flash cards for 2 minutes onlyReviewCheck the assignmentReview the steps in solving word problems.Ask the learners to tell what they understand about the following essential guide questions to problem solving.What are given?How will you solve the problem?What operation will be used?What is the number sentenceIs the solution or process correct?What is the answer?MotivationTalk about fruits and vegetables grown in the school garden.Ask: Have you been to our school garden? What did you see there? What are the plants grown there? Let the pupils share their experiences in the garden.Values Integration: Elicit from the pupils that growing vegetables in the garden helps improve our supply of food and contribute to our health also.Developmental ActivitiesPresentationThe table shows the number of kilograms of vegetables harvested by the pupils. Prince Mustard5. 12 kilogramsAldrinPechay8.48 kilogramsLorenCarrot12.6 kilogramsBased on the table presented , how will you create problems involving addition and subtraction of decimals including money?Ask: What is asked in the problem?What are given facts?What word clue help you solve the problem?What operation is to be used?Ask a pupil to show his/her answer on the board.Performing the ActivitiesGroup the pupils into three. Let the group work collaboratively on station 1 for group 1, station 2 for group 2 and station 3 for group 3.Let them present their output one at a time when done. Station 1 – Addition of decimalsDirection: Based on the table of data presented, create a problem involving addition of decimals.Station 2 – Subtraction of fractionDirection: Based on the table of data presented, create a problem involving subtraction of decimals.Station 3 – Addition and Subtraction of fractionDirection: Based on the table of data presented, create a problem involving addition and subtraction of decimals. Sample problemStation 1Prince and Loren harvested vegetables. Prince harvested 2.5 kg of pechay and Loren harvested 1.9 kg. of carrot. How many kg. Of vegetables were harvested by the two pupils?Station 2Prince and Loren harvested vegetables. Prince harvested 2.5 kg of pechay and Loren harvested 1.9 kg. of carrot. How many more kg. of vegetables were harvested by Prince than Loren?Station 3Prince and Loren harvested vegetables. Prince harvested 2.5 kg of pechay and Loren harvested 1.9 kg. of carrot. If Aldrin harvested 5 kg of Mustard, How many kg.more is his harvest than the total amount harvested by Prince and LorenProcessing the Activities.After all the groups have presented, ask How did you find the activity? How did you create problems involving Addition , Subtraction or addition and subtraction of decimals. Expected answers:We familiarized ourselves with the concepts of addition and subtraction of decimals.We taught of the problem we want to create. We studied sample problems and studied their solutions.Reinforcing the concept and skillDiscuss the presentation under Explore and Discover on page of LM Math Grade V.Ask the pupils to work on the items under Get Moving LM Math Grade 5 page __ .Check the pupils answer. For mastery, have them answer items under Keep Moving, LM Math Grade V page __. Check the pupils answerSummarizing the Lesson Lead the pupils to give the following generalization by asking:To create word problems involving addition and subtraction of fractions do the ff.Familiarize yourself with the conceptThink of the problem you want to create.Consider the character, cite the situation, /setting, data presented, word problem to be created, and the key question.Ensure that the word problem is clearly stated and practicalRead some sample problems and study their solutions.To solve non- routine problems, read and analyze the problems. Tell what is asked and what are given. Use other strategies like act out the problem,listing/table method, guess and test, drawing /making a diagram, using patterns, working backwards etc.How do you create problems involving addition and subtraction of decimals?Applying to New and Other SituationAsk the pupils to do items 1 to 5 under Apply your skills on page ____ of LM Math Grade V.AssesmentUsing the data below, create 3- two step word problem involving addition and subtraction of decimals MENUSpaghetti-P 23.75Gulaman-P6.00Palabok -P21.50Nilaga(pork)- P22.50Lugaw- P 8.50Pinakbet- P 15.00Rice- P 5.00Fried Fish- P 12.00Mango Juice-P7.50Home Activity Using the data below ,create a two-step word problem involving addition and subtraction of fraction.NameFruits boughtQuantity in Kg.SharonBanana12.65 kg.AnnaGuava23.16kg.JosefaLanzones9.16kg.Enrichment:Using the data below ,create a two-step word problem involving addition and subtraction of fraction.NameFruits boughtQuantity in Kg.ShaneApple212.65 kg.LitoMango87.39 kg.JosephBanana55.08 kg. ................
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