Adding and Subtracting Decimals Lesson 8.1 Adding Decimals (Part 1)
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1 CHAPTER8 Adding and Subtracting Decimals Lesson 8.1 Adding Decimals (Part 1) Add. Ones Tenths Fill in the blanks. Write each sum as a decimal tenths tenths tenths Extra Practice 4B 25
2 Fill in the blanks. Write each sum as a decimal tenths tenths tenths Add Write in vertical form. Then add Chapter 8 Lesson 8.1
3 Lesson 8.1 Adding Decimals (Part 2) Add. Ones Tenths Hundredths Fill in the blanks. Write each sum as a decimal hundredths hundredths hundredths hundredths hundredths hundredths Extra Practice 4B 27
4 Fill in the blanks. Write each sum as a decimal hundredths hundredths hundredths Add. 5. $ $ $ $ $ $ $ $ Write in vertical form. Then add. 9. $0.08 $0.51 $ 10. $0.37 $0.85 $ 11. $0.79 $0.57 $ 12. $0.65 $0.78 $ 28 Chapter 8 Lesson 8.1
5 Lesson 8.2 Subtract. Subtracting Decimals Ones Tenths Hundredths Fill in the blanks. Write the difference as a decimal tenths tenths tenths tenths tenths tenths Extra Practice 4B 29
6 hundredths hundredths hundredths hundredths hundredths hundredths Subtract Write in vertical form. Then subtract Chapter 8 Lesson 8.2
7 Lesson 8.3 Solve. Show your work. Real-World Problems: Decimals 1. The weight of a bag of potatoes is 2.5 pounds. Ms. Bennett uses 0.55 pound of potatoes on the fi rst day and 1.08 pounds on the second day. How many pounds of potatoes are left? 2. Ms. Petrie buys some peaches for $4.95 and some breakfast cereal for $7.85. Ms. Petrie had $50 before she went shopping. How much money does Ms. Petrie have left after she buys the peaches and cereal? Extra Practice 4B 31
8 3. The total weight of Container A and Container B is 71.4 pounds. The total weight of Container B and Container C is 58.5 pounds. The weight of Container C is 29.7 pounds. What is the weight of Container A? 4. In a long jump competition, Paul jumps 0.16 meter farther than Royston. Shawn jumps 0.24 meter less than Paul. Shawn jumps a distance of 1.04 meters. How far does Royston jump? Royston Paul Shawn 0.16 m 1.04 m 0.24 m 32 Chapter 8 Lesson 8.3
9 5. The distance between John s home and his school is 7.49 kilometers. The distance from John s school to the Tennis Academy is 9.87 kilometers. a. John travels from home to school and then to the Academy. How far does John travel? b. After his tennis class, John goes back to school. What is the total distance John travels? Extra Practice 4B 33
10 6. Greg makes a kite using the following materials. KITE MATERIALS 1 long stick 60 cm 1 short stick 45.8 cm 1 tail 3.6 m 1 ball of string 180 m a. How much shorter is the short stick than the long stick? b. How many long sticks put end to end will be needed to equal the total length of the tail? 34 Chapter 8 Lesson 8.3
11 Put on Your Thinking Cap! Solve. Show your work. 1. Find the result when you subtract the sum of 3.68 and 8.97 from Bernard has $6.00 less than Andy but $2.75 more than Calvin. How much more money does Andy have than Calvin? Use the given information to answer the questions. School Sale Item Regular Price Sale Price Ballpoint Pen $2.30 $1.95 Correction Pen $3.50 $2.75 Mechanical Pencil $1.20 $ How much do you save when you buy 3 ballpoint pens on sale instead of at the regular price? Extra Practice 4B 35
12 4. Julio buys 2 mechanical pencils and a correction pen at the sale price. He gives the cashier a $10 bill. How much change does Julio get back? 5. Nicolas bought the same items as Julio before the sale. How much more did Nicolas pay for the items than Julio? 6. Read the clues, then work backward to fi nd the number. a. If you subtract 4.75 from the number and then add 1.75, you get 35. What is the number? b. If you add 6.75 to the number and subtract 3.78 from the result, you get What is the number? 36 Chapter 8 Put on Your Thinking Cap!
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Be sure students get all the combinations that add to , 1+9, 2+8, 3+7, 4+6, 5+5, 6+4, 7+3, 8+2, 9+1, 10+0
Lesson: Ten Lap Challenge Grades: K-1 Skills: Ways to make 10, number sense Time: 20 minutes What to do: Tell students they have two days to run ten laps in the gym. Have them use the worksheet on the
Grade 5: Number Sense - Fractions & Decimals
Grade 5: Number Sense - Fractions & Decimals Unit 8, Lessons 1-12, Pages 256-298 The star highlights important ideas. The globe links to the web. Click these figures to show the answer. Links to an activity