Mod 4 lesson 19
- 3. Module 4 Lesson 19 Substituting to Evaluate Addition and Subtraction Expressions.notebook 3 April 01, 2015 Nov 172:29 PM Classwork Opening Exercise My older sister is exactly two years older than I am. Sharing a birthday is both fun and annoying. Every year on our birthday we have a party, which is fun, but she always brags that she is two years older than I am, which is annoying. Shown below is a table of our ages, starting when I was born: 1. Looking at the table, what patterns do you see? Tell a partner. 2. On the day I turned 8 years old, how old was my sister? 3. How do you know? 4. On the day I turned 16 years old, how old was my sister? 5. How do you know? 6. Do we need to extend the table to calculate these answers?
- 6. Module 4 Lesson 19 Substituting to Evaluate Addition and Subtraction Expressions.notebook 6 April 01, 2015 Apr 68:33 PM d. Look at the table in Example 2. If you know my sister’s age, can you determine my age? e. If we use the variable G for my sister’s age in years, what expression would describe my age in years? f. Fill in the last row of the table with the expressions. g. With a partner, calculate how old I was when my sister was 22, 23, and 24 years old.
- 8. Module 4 Lesson 19 Substituting to Evaluate Addition and Subtraction Expressions.notebook 8 April 01, 2015 Apr 68:35 PM a. If we let D be the number of days since the new school year began, on day D of school, how many box tops will Noah have brought to school? b. On day D of school, how many box tops will Carter have brought to school? c. On day 10 of school, how many box tops will Noah have brought to school? d. On day 10 of school, how many box tops will Carter have brought to school?
- 9. Module 4 Lesson 19 Substituting to Evaluate Addition and Subtraction Expressions.notebook 9 April 01, 2015 Apr 68:35 PM 2. Each week the Primary School recycles 200 pounds of paper. The Intermediate School also recycles the same amount but had another 300 pounds left over from summer school. The Intermediate School custodian added this extra 300 pounds to the first recycle week. a. Number the weeks and record the amount of paper recycled by both schools. b. If this trend continues, what will be the total amount collected for each school on Week 10?
- 12. Module 4 Lesson 19 Substituting to Evaluate Addition and Subtraction Expressions.notebook 12 April 01, 2015 Aug 268:21 PM Closing Please take out your exit ticket for Lesson 19, close your binder, and complete the exit ticket. This will be collected. § Why were we able to write these expressions? ú There was a relationship between the two quantities that we could identify. § What is important to remember about labeling columns in a table? ú The label should be complete, with units, so the reader understands precisely what is meant. § How are addition and subtraction expression related to one another? ú They are inverse operations. One undoes the other. Continue for Sprints!!!!