**Mathematics Lesson Plan for Grade 6 and**

**Ppt**

**Interactive for Whiteboards**

**EVALUATING AN EXPRESSION WITH 2 DIFF. OPERATIONS WITHOUT EXPONENTS & PARENTHESIS**

**Review**

**a. Activity I — Naming the Baby**

*Direction: Use any of the four fundamental operations in giving the possible equation*

**Example: 20**

**Possible Answers: 20 = 4 x 5; 20 = 1 x 20; 2 x 10 = 20; 40÷2 = 20; 100÷5=20; 15+5=20; 18+2=20; 17+3=20**

**Mechanics:**

**a) Form 4 groups.**

**b) The teacher flashes a card having 2-digit number.**

**c) Each group decides within 60 seconds for their answer.**

**d) One member of each group simultaneously goes to the board and writes their answers within 60 seconds.**

**e) The group with the most number of correct answers wins.**

**b. Activity 2— Stating the Equation**

*Direction: State an equation for a situation***Example: For the next 7 years Minerva turns 27 years old. How old is she now?**

**3. Motivation**

**Ask the pupils about the occupation of their parents. Let them tell how they help their parents earn a living.**

**B. Developmental Activities**

**1. Presentation**

**a. Activity I — Use of Role Play in a Sari-Sari Store**

Jethro is helping his mother in their store when a delivery man comes and delivers 20 dozens of eggs at P42 a dozen. If the delivery man gives him P160, how much is his money? Is he right asking for P260, if his money is P1000? Why? |

**a) Who helps mother in the store?**

**b) Who delivers dozens of eggs?**

**c) How many dozens of eggs are delivered to them?**

**d) If you were Jethro:**

**• will you help your family earn a living? Why?**

**• will you keep the change given by the delivery man? Why?**

**2) Have each pair of pupils act it out using play money and ask them to answer the following:**

**a) What are the given data?**

**b) What are the operations to be used?**

**3) Lead each pair of pupils to think of an expression related to the problem.**

**4) Let them evaluate the expression they have formulated?**

**P160+20xP42**

**P160 + P840**

**P1000 money of Jethro**

**5) Require them to analyze which operation they use before arriving at the exact change.**

**b. Activity 2- Use of Test Items**

*Tita was absent for a week because she was sick. When she went to school, she had to take a test. Few of the items given are shown below.***a. 2 x 3 + 4 d. 35 – 6 x 3**

**b. 7 x 9 - 3 e. 3 x 2 + 4**

**c. 18 – 12 ÷ 2 f. 48 ÷ 12 + 8**

**Can you answer these? Let us try to answer the items.**

**1) Ask each pair of pupils answer the following questions:**

**a) What facts are given?**

**b) What operations are in a problem? Which operation comes first? Which operation will you do first?**

**2) Guide each pair of pupils evaluate the expressions.**

**a. 2x3+4= b. 7x9-3 c. 18-12÷2**

**6 + 4 63 - 3 18 - 6**

**10 60 12**

**d. 35-6x3 e. 3x2+4 f. 48÷12+8**

**35 - 18 6 + 4 4 + 8**

**17 10 12**

**3) Lead each pair of pupils analyze how to arrive at the answer.**

**2. Practice Exercises/Fixing Skills**

*Evaluate the expression.***a. 8+4-2**

**b. 5x8-4`**

**c. 65-91=7**

**d. 723x8**

**e. 67+33-25**

**3. Generalization:**

**How do we evaluate an expression with two different operations without exponents and parenthesis/grouping symbols?**

**C. Application**

**Write an expression about the problems. Then evaluate the expression.**

**a) In a certain eatery, there are 5 glass racks having 24 glasses and 8 left over. The answer says she has 130 glasses in all. Is she right? Why?**

**b) Use the number less than 7 once to make the expression right.**

**! x**

**! -**

**!**

**! -**

**!**

**27**

**c) Write the operation in the box to make the expression right.**

**81**

**! 9**

**! 7**

**81**

**! 63**

**18**

**IV. Evaluation**

**Evaluate the following expressions.**

**1. 4x3+8 6. 7x8+130**

**2. 84÷3x4 7. 195÷3x5**

**3. 76-8+5 8. 3+83-73**

**4. 53+7-20 9. 76-8x9**

**5. 3x5÷25 10. 90x5÷75**

**EVALUATING AN EXPRESSION WITH 2 DIFF. OPERATIONS WITHOUT EXPONENTS & PARENTHESIS**

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