Lesson 37- Creating Problems (with reasonable answers)Involving Addition and Subtraction of Decimal Numbers Including Money

Second Grading Period, Week 3

I. Objective

Create 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 solving

Materials: flash cards, chart of word problems, activity cards

References: M5NS-IIc-109.1,

Instructional Procedures

A. Preliminary Activities1. Drill

Have a drill on solving problems involving addition and subtraction of decimals using flash cards for 2 minutes only

2. ReviewA. Check the assignmentB. Review the steps in solving word problems.

Ask the learners to tell what they understand about the following essential guide questions to problem solving.

What is asked in the problem?

Value Focus: Accepting social responsibilities

What are given?

How will you solve the problem?

What operation will be used?

What is the number sentence

Is the solution or process correct?

What is the answer?

3. 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.

B. Developmental Activities

1. PresentationThe table shows the number of kilograms of vegetables harvested by the pupils.

Prince Mustard 5. 12 kilogramsAldrin Pechay 8.48 kilogramsLoren Carrot 12.6 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.

2. 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 Loren

3. Processing 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.

4. Reinforcing the concept and skill

Discuss 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 answer

5. Summarizing the Lesson Lead the pupils to give the following generalization by asking:How do you create problems involving addition and subtraction of decimals?

6. 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.

C. AssesmentUsing the data below, create 3- two step word problem involving addition and subtraction of decimals MENU

Spaghetti-P 23.75 Gulaman-P6.00Palabok -P21.50 Nilaga(pork)- P22.50Lugaw- P 8.50 Pinakbet- P 15.00Rice- P 5.00 Fried Fish- P 12.00Mango Juice-P7.50

To create word problems involving addition and subtraction of fractions do the ff.a. Familiarize yourself with the conceptb. Think of the problem you want to create.

1. Consider the character, cite the situation, /setting, data presented, word problem to be created, and the key question.

2. Ensure that the word problem is clearly stated and practicalc. Read some sample problems and study their solutions.

D. Home Activity1. Using the data below ,create a two-step word problem involving addition and subtraction

of fraction.

Name Fruits bought Quantity in Kg.Sharon Banana 12.65 kg.Anna Guava 23.16kg.Josefa Lanzones 9.16kg.

Enrichment:

1. Using the data below ,create a two-step word problem involving addition and subtraction of fraction.

Name Fruits bought Quantity in Kg.Shane Apple 212.65 kg.Lito Mango 87.39 kg.Joseph Banana 55.08 kg.