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Name _______________________________________ Date __________________ Class __________________ LESSON 17-1 Adding Integers with the Same Sign Practice and Problem Solving: D Find each sum. White counters are positive. Black counters are negative. The first one is done for you. 2. 4 6 1. 5 2 7 a. How many counters are there? _______ a. How many counters are there? _______ b. Do the counters represent positive b. Do the counters represent positive positive or negative numbers? ______________ c. or negative numbers? _________________ 7 5 2 ______________ c. 4 6 _______ Model each addition problem on the number line to find each sum. The first one is done for you. 5 3. 3 2 ________ 4. 5 1 ________ 5. 4 3 ________ 6. 1 6 ________ Find each sum. The first one is done for you. 4 7. 3 1 ________ 8. 6 2 _______ 9. 12 7 _______ 10. 20 15 _______ Solve. 11. The table shows how much money Hannah withdrew in 3 days. Day Dollars Day 1 Day 2 Day 3 5 1 2 Find the total amount Hannah withdrew. ___________________________ Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor. 347 Name _______________________________________ Date __________________ Class __________________ LESSON 17-2 Adding Integers with Different Signs Practice and Problem Solving: D Show the addition on the number line. Then write the sum. The first one is done for you. 1. 2 (3) 2. 3 (4) 1 _______________________________________ ________________________________________ Find each sum. The first one is done for you. 3. 4 (9) 4. 7 (8) 5 _______________________ 6. 5 7 _______________________ 9. 2 (7) _______________________ ________________________ 7. 9 (5) 5. 2 1 ________________________ 8. 1 9 ________________________ 10. 6 (4) ________________________ ________________________ 11. 15 9 ________________________ Solve. The first one is done for you. 12. The temperature dropped 12F in 8 hours. If the final temperature was 7°F, what was the starting temperature? 5F ________________________________________________________________________________________ 13. At 3 P.M., the temperature was 9F. By 11 P.M., it had dropped 31F. What was the temperature at 11 P.M.? ________________________________________________________________________________________ 14. A submarine submerged at a depth of 40 feet dives 57 feet more. What is the new depth of the submarine? ________________________________________________________________________________________ 15. An airplane cruising at 20,000 feet drops 2,500 feet in altitude. What is the airplane’s new altitude? ________________________________________________________________________________________ Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor. 348