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Word Problems. Objective: Students will solve word problems involving decimals. Standard: NS 2.1 Add, subtract, multiply, and divide with decimals, and verify the reasonableness of the results. Decimal Poem. Decimal point, decimal point, where do you go? In addition and subtraction,

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Decimal poem
Decimal Poem decimals.

Decimal point, decimal point,

where do you go?

In addition and subtraction,

You line up in a row.

When we multiply decimals,

We count their places,

Put a decimal in the product,

Counting right to left spaces.

Decimal point, decimal point,

Where do you go?

A decimal in the quotient,

Aligns with the dividend below.


Warm up
Warm Up decimals.

  • On your whiteboards, find solutions to the following problems:

    459.8 – 12.34

    24.67 X 1.8

    0.63 ÷ 0.07

    1.92 + 26

447.46

44.406

9

27.92


Center directions
Center Directions decimals.

  • You will be working in groups to solve a word problem.

  • You will need to complete the worksheet for each problem.

  • You will have 12 minutes at a center, then rotate to the next center.

  • Your group will be responsible to present your solutions to the class.


Group norms
Group Norms decimals.

  • Listen to each other’s ideas.

  • Respect everyone’s opinion by asking for clarification.

  • Politely agree or disagree.

  • Investigate together and stay on task.

  • Make sure everyone in your group can explain your group’s thought process.


Watch me
Watch Me decimals.

  • Homer bought 3 small bags of potato chips that cost 69 cents each. How much did they cost altogether?

  • $2.07


Group norms1
Group Norms decimals.

  • Listen to each other’s ideas.

  • Respect everyone’s opinion by asking for clarification.

  • Politely agree or disagree.

  • Investigate together and stay on task.

  • Make sure everyone in your group can explain your group’s thought process.


#1 decimals.

  • Maria had $4.65 in nickels. How many nickels did she have?

  • She has 93 nickels.


#2 decimals.

  • Max and Moe each timed his own quarter-mile run with a stopwatch. Max says that he ran the quarter in 74.5 seconds. Moe is more accurate. He reported his run as 81.34 seconds. How many seconds faster did Max run than Moe?

  • Max ran 6.84 seconds faster than Moe.


#3 decimals.

  • Lexi has $25 to buy workout clothes. She needs to buy a pair of gym shorts for $7.95, a long-sleeved t-shirt for $8.29, and a pair of crew socks for $3.50. Does Lexi have enough money to pay for all three items? If so, how much change will she get back? (All items include sales tax.)

  • Yes, Lexi has enough money. She has $5.26 left.


#4 decimals.

  • The price of an ant farm is twenty-eight dollars. The cash register multiplies the price by 1.07 to find the total cost including tax. What is the total cost of the ant farm?

  • The total cost of the ant farm is $29.96.


Ticket out the door
Ticket Out the Door decimals.

  • It costs 33 cents to mail a letter and 20 cents to mail a postcard. Maria is going to the post office to mail two letters and three postcards. She has $2 to spend. Does she have enough money? If so, how much change will she get back?


#1 decimals.

  • Maria had $4.65 in nickels. How many nickels did she have?


#2 decimals.

  • Max and Moe each timed his own quarter-mile run with a stopwatch. Max says that he ran the quarter in 74.5 seconds. Moe is more accurate. He reported his run as 81.34 seconds. How many seconds faster did Max run than Moe?


#3 decimals.

  • Lexi has $25 to buy workout clothes. She needs to buy a pair of gym shorts for $7.95, a long-sleeved t-shirt for $8.29, and a pair of crew socks for $3.50. Does Lexi have enough money to pay for all three items? If so, how much change will she get back? (All items include sales tax.)


#4 decimals.

  • The price of an ant farm is twenty-eight dollars. The cash register multiplies the price by 1.07 to find the total cost including tax. What is the total cost of the ant farm?


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