PPT 1 FOR MATH PRE-DEMONSTRAUKGHVGCHCTION.pptx

FOR EDUCATIONAL PURPOSE ONLY

1. MATHEMATICS 7 Prepared By: Alvin D. Libre

2. Evaluate the following expression. Review 1. If x=3, evaluate x+5. 2. If y=4, evaluate 2y−3. 3. If z=6, evaluate 2z+1. 4. If m=-1, evaluate 5m+6 5. If e= -3, evaluate 3e-10 8 5 13 1 -19

3. “Guess the Number ’’

4. "I am thinking of a number. If you add 5 to it, the result is 12. What is my number?" 7

5. “If you double a number, you get 14. What is the number?” 7

6. “I subtracted 3 from a number, and the result is 7. What is the number?” 10

7. “A number is divided by 4, and the answer is 6. What is the number?” 24

8. “I multiplied a number by 3 and got 15. What is the number?” 5

9. Learning Objectives .

10. “IT’S BAR TIME!” Instruction: Each group will solve the assigned equation using the Bar Model and present the solution. Group 1: Solve x + 7 = 12 Group 2: Solve y – 5 = 9 Group 3: Solve 3z = 15 Group 4: Solve w÷4 = 8

11. 2. What operations did you use to solve for the unknown number? 3. Why is it important to understand the relationship between the parts in an equation? 1. How do you find this activity ?

12. Modeling Simple Equation using Bar Models

13. 1. How do we find the unknown value in an equation? 2. How does the Bar Model helps you to solve equations? 3. How does the Bar Model help you feel confident in solving equations?

14. Direction: solve a real-life word problem individually using the Bar Model. Apply Me! 1. Lisa bought 3 notebooks and paid a total of 150 pesos. How much does each notebook cost? 2. John and his sister saved a total of 200 pesos. If John saved 80 pesos, how much did his sister save?

15. Direction: Solve a real-life word problem individually using the Bar Model. Apply Me! 1. Lisa bought 3 notebooks and paid a total of 150 pesos. How much does each notebook cost? 3X=150

16. Apply Me! 2. Lisa bought 3 notebooks and paid a total of 150 pesos. How much does each notebook cost?

17. x 50 x x x x 150 3x 50 50 50 80 x 200 120 1.) x+80=200 2.) 3x=150 Therefore, each notebook cost of 50 pesos. Therefore, John’s sister saves 120 pesos.

18. Solve Me! Direction: Solve the following equations using a Bar Model. 1. x + 4 = 10 2. y – 3 = 8 3. 2z = 14

19. 1.) x+4=10 2.) y-3=8 3.) 2z=14 x 6 7 7 z z 14 2z 11 y 8 y -3 4 7 z 10 x

20. Learning Objectives .

21. Assignment Instruction: Create at least two (2) real-life word problem and solve it using a Bar Model. Write your answer in ½ sheet of paper.

22. Thank you! Do you have any questions? [phone]