Construction Costs *Complete this activity in the Normal (Non-Play) View

1 in = 1 ft Sidewalk Section #1 Sidewalk Section #3 Sidewalk Section #2 Your school has decided to build a new sidewalk in front of the building. The material for each foot of sidewalk will cost $10. Use the down ( ↓ ) arrow key to move to the next slide.

1 in = 1 ft Sidewalk Section #1 Sidewalk Section #3 Sidewalk Section #2 Click, drag and rotate the ruler to measure the length of each sidewalk section. Double-click on the green text box then type the lengths of each section. Use the down ( ↓ ) arrow key to move to the next slide. Section #1 Section #2 Section #3

1 in = 1 ft Sidewalk Section #1 Sidewalk Section #3 Sidewalk Section #2 The key states that 1 inch equals 1 foot. If the material for each foot of sidewalk cost $10, calculate how much it will cost for each section. If you need to, use the up ( ↑ ) arrow key to return to the previous slide and the down ( ↓ ) arrow key to move to the next slide. Remember to double-click on the green text box to type your response. Section #1 Cost Section #2 Cost Section #3 Cost

How much will it cost for all three sections? Type the answer in the green box below. If you need to, use the up ( ↑ ) arrow key to return to the previous slide and the down ( ↓ ) arrow key to move to the next slide. Total Cost

On a separate project, Renisha has determined that a new sidewalk section is 4 feet in length. To calculate the cost of the track, she multiplies: 4 x $10 However, Lee tries to convince her to solve the problem by adding: $10 + $10 + $10 + $10 Both Renisha’s and Lee’s answers of $40 are correct. Explain how it is possible for both Renisha and Lee to correctly calculate the cost of the railroad track even though Renisha multiplied and Lee added. Record an explanation of how you solved the problem. Insert  Movies and Sounds  Record Voice