3. (30x3 50x2 + 20x 80) (17x3 + 26x + 19) – – – 30x3 50x2 + 20x 80 – – + -17x3 - 26x 19 – III. Exercises A. Perform the indicated operation, first using the tiles when applicable, then using paper and pen. 1. 3x + 10x 6. 10xy 8xy – 2. 12y 18y 7. 20x2y2 + 30x2y2 – 3. 14x3 + (-16x3) 8. -9x2y + 9x2y 4. -5x3 -4x3 9. 10x2y3 10x3y2 – 5. 2x 3y 10. 5x 3x 8x + 6x – – – B. Answer the following questions. Show your solution. What is the sum of 3x2 11x + 12 and 18x2 + 20x 100? – – What is 12x3 5x2 + 3x + 4 less than 15x3 + 10x + 4x2 10? – – What is the perimeter of the triangle shown at the right? If you have (100x3 5x + 3) pesos in your wallet and you spent – (80x3 2x2 + 9) pesos in buying foods, how much money is left in your – pocket? What must be added to 3x + 10 to get a result of 5x 3? – Summary In this lesson, you learned about tiles and how to use them to represent algebraic expressions. You learned how to add and subtract terms and polynomials using these tiles. You were also able to come up with the rules in adding and
3. (30x3 – 50x2 + 20x – 80) – (17x3 + 26x + 19) 30x3 – 50x2 + 20x – 80 + -17x3 - 26x – 19 III. Exercises A. Perform the indicated operation, first using the tiles when applicable, then using paper and pen. 1. 3x + 10x 6. 10xy – 8xy 2. 12y – 18y 7. 20x2y2 + 30x2y2 3. 14x3 + (-16x3) 8. -9x2y + 9x2y 4. -5x3 -4x3 9. 10x2y3 – 10x3y2 5. 2x – 3y 10. 5x – 3x – 8x + 6x B. Answer the following questions. Show your solution. What is the sum of 3x2 – 11x + 12 and 18x2 + 20x – 100? What is 12x3 – 5x2 + 3x + 4 less than 15x3 + 10x + 4x2 – 10? What is the perimeter of the triangle shown at the right? If you have (100x3 – 5x + 3) pesos in your wallet and you spent (80x3 – 2x2 + 9) pesos in buying foods, how much money is left in your pocket? What must be added to 3x + 10 to get a result of 5x – 3? Summary In this lesson, you learned about tiles and how to use them to represent algebraic expressions. You learned how to add and subtract terms and polynomials using these tiles. You were also able to come up with the rules in adding and
7-math-lm_mod3.docx