Solve Problems with Money

Transcription

1 SS NS 3.3G5.NB.7 Solve problems Add, subtract, involving multiply, addition, and divide subtraction, decimals to multiplication, hundredths, using and concrete models or drawings and strategies based on place value, division of money amounts in decimal notation and multiply and properties of operations, and/or the relationship between addition and subtraction; divide relate the money strategy amounts to a written in decimal method and notation explain by theusing wholenumber multipliers and reasoning used. divisors. UNDRLYNG SKLLS AND ONS: add and subtract with money; choose the operations Solve roblems with Money Key d e a When you add or subtract decimals, you need to line up the numbers on the decimal points. stimate to be sure that your answer makes sense after you place the decimal point. $ $ have no problem with money! $ $ $$$ $ $ $ $ x a m p x a m p l l 1 Mary bought a taco and milk for lunch. he taco cost $1.59. Milk cost $0.70. How much money did she spend? Find $1.59 $0.70. Write the problem vertically. Line up the decimal points. hen add as with whole numbers. Write a dollar sign and a decimal point. o check, estimate. Did you put the decimal point in the right place? 2 1 $ $2.29 Marco owes $3.09 for lunch. He paid with a 5-dollar bill. How much change should he get back? Find $5.00 $3.09. Write the problem vertically. Line up the decimal points. hen subtract as with whole numbers. Write a dollar sign and a decimal point. o check, add back. Did you put the decimal point in the right place? $ $1.91 stimate to check. $1.59 is about $1.50 $0.70 is about $0.50 otal is about $2.00. Add back to check. $ = $5.00 page 242 hapter 21 Lesson 1

2 R A stimate to check your answers. Show your work. 1. $1.28 $2.90 $ $3.85 $1.30 $ $ $3.01 $0.56 $ $3.77 $1.89 $ $ $ 1.99 $10.00 $ $10.00 $8.99 $ $ $ Dora bought a pretzel and fruit. She gave the clerk $5.00. How much change should she get? $ Kareem bought two pretzels. He gave the clerk $2.00. How much change should he receive? $ Mr. Smith bought one of each item on the list. He paid with $5.00 and got $1.80 in change. Did he stimation MR David has a $10 bill. He wants to buy a collar for $5.00, a brush for $3.98 and shampoo for $4.50. Does he have enough money? xplain why you don t need an exact solution to find out. No; ossible answer: f estimate, the cost of the collar and the shampoo cost almost $10. know he won t have $3.98 left for the brush. hapter 21 Lesson 1 page 243

3 R A at home! stimate to check your answers. Show your work. 1. $1.36 $2.80 $ $3.75 $1.20 $ $ $3.04 $0.52 $ $3.66 $1.78 $ $ $2.39 $10.00 $ $10.00 $7.99 $ $ $ Aileen bought crackers and fruit. She gave the clerk $2.00. How much change should she get? $ Juston bought two juices. He gave the clerk $5.00. How much change should he receive? $ Mr. Marcus bought one of each item on the list. He paid with $10.00 and got $6.80 in change. Did he stimation MR Martha has a $10 bill. She wants to buy shampoo for $5.60, a brush for $3.68, and hair clips for $3.25. Does she have enough money? xplain why you don t need an exact solution to find out. No; if estimate the shampoo and brush will cost over $9.00. here will not be enough left to buy the clips. page 162 Home Resource and Homework hapter 21 Lesson 1

4 R A stimate to check your answers. Show your work. 1. $1.28 $2.90 $ $3.85 $1.30 $ $ $3.01 $0.56 $ $3.77 $1.89 $ $ $ 1.99 $10.00 $ $10.00 $8.99 $ $ $ Dora bought a pretzel and fruit. She gave the clerk $5.00. How much change should she get? $ Kareem bought two pretzels. He gave the clerk $2.00. How much change should he receive? $ Mr. Smith bought one of each item on the list. He paid with $5.00 and got $1.80 in change. Did he stimation MR David has a $10 bill. He wants to buy a collar for $5.00, a brush for $3.98 and shampoo for $4.50. Does he have enough money? xplain why you don t need an exact solution to find out. No; possible answer: f estimate, the cost of the collar and the shampoo cost almost $10. know he won t have $3.98 left for the brush. hapter 21 Lesson 1 Student Book age page 243

5 R A at home! stimate to check your answers. Show your work. 1. $1.36 $2.80 $ $3.75 $1.20 $ $ $3.04 $0.52 $ $3.66 $1.78 $ $ $2.39 $10.00 $ $10.00 $7.99 $ $ $ Aileen bought crackers and fruit. She gave the clerk $2.00. How much change should she get? $ Juston bought two juices. He gave the clerk $5.00. How much change should he receive? $ Mr. Marcus bought one of each item on the list. He paid with $10.00 and got $6.80 in change. Did he stimation MR Martha has a $10 bill. She wants to buy shampoo for $5.60, a brush for $3.68, and hair clips for $3.25. Does she have enough money? xplain why you don t need an exact solution to find out. No; if estimate the shampoo and brush will cost over $9.00. here will not be enough left to buy the clips. page 162 Home Resource and Homework hapter 21 Lesson 1