Bell Work/Cronnelly −9 − −18 − 3 4 + − 7 8 −8.6 −3.4 2 −8.6 −3.4 2 −83.75 − −61.72 +134.29

Bell Work/Cronnelly −9 − −18 − 3 4 + − 7 8 −8.6 −3.4 2 −8.6 −3.4 2 −83.75 − −61.72 +134.29 9 -13/8; -1 5/8 58.48 112.26

In today’s lesson, you will continue to simplify expressions using the correct order of operations.  You will also learn how to identify terms in expressions that are more complicated.

3-12. For each of the following expressions: Simplify the expression (circle your terms!) a. −3 + 4(−2)3 + 5 b. −32 + 4(−2 + 5)

3-13. Katrina and Madeline were working on problem 3‑12 when Madeline noticed, “These two expressions look almost the same, except that one has two terms, while the other has three!” Discuss Madeline’s observation with your team.  Explain which expression has two terms and which has three.  Terms in expressions are separated by addition (+) and subtraction (–) signs unless the sum or difference is inside  parentheses.  

3-14. Consider the expression 3(5 + 2 · 4) + 2(−3). a. Work with your team to draw a diagram representing this expression.  Your diagram could show Cecil’s movements, for example, or it could show  +  and  – tiles that could be represented by this expression. b. Simplify the expression. c. Discuss with your team how you might circle terms in this expression.  Be ready to explain your ideas to the class.   

3-15. For each of the following expressions, visualize them as Cecil’s movements on a tightrope or as groups of  +  and  –  tiles.  Then: Describe to your team members how you see each expression.  Circle the terms and simplify each expression.    3(8.63) + 1 b. 1 + 3(8.63) 4 1 3  + 2(3 2 5 ) + 5 d. 4 1 3  + 2(3 2 5  + 5) 4 +(−2) + 3(5) f. 2(−4 + 3 + 5) g. 2.68(20) + 4 + 3(−5) h. 4(−7.6) + 3 1 2 (100 + 5)

Exit Ticket Copy each expression below and circle each term.  Then simplify each expression.  a. −8 + 2(−5) b. 3(7.5 + 2) + 4.6   c. 4 1 2 (−2 + 1 + 7) d. 5(6 + 2) + 4 + 2 (−5 + 8)

Exit Ticket Copy each expression below and circle each term.  Then simplify each expression.  a. −8 + 2(−5) b. 3(7.5 + 2) + 4.6   c. 4 1 2 (−2 + 1 + 7) d. 5(6 + 2) + 4 + 2 (−5 + 8) –18 33.1 50 27

Practice 1. 43−1 4+2 +10 5. 20÷[4− 10−8 ] 2. 6−4 ∙ 49÷7 6. 15+6 ÷7−2 3. 6+29−9÷3 7. 40÷4−(5−3) 4. 9+8−21÷7 8. 7+10 ∙8−3

Practice 1. 43−1 4+2 +10 5. 20÷[4− 10−8 ] 2. 6−4 ∙ 49÷7 6. 15+6 ÷7−2 3. 6+29−9÷3 7. 40÷4−(5−3) 4. 9+8−21÷7 8. 7+10 ∙8−3 17 10 1 14 32 8 17 84