Lesson 14: Using Operations on Decimals to Solve Problems | Unit 5: Arithmetic in Base Ten

Open Ended

A roll of ribbon was 12 meters long. Diego cut 9 pieces of ribbon that were 0.4 meter each to tie some presents. He then used the remaining ribbon to make some wreaths. How many meters of ribbon were available for making wreaths? Explain your reasoning.

Open Ended

A roll of ribbon was 12 meters long. Diego cut 9 pieces of ribbon that were 0.4 meter each to tie some presents. He then used the remaining ribbon to make some wreaths. Each wreath required 0.6 meter. How many wreaths could Diego make with the available ribbon? Explain your reasoning.

Multiple Choice

The Amazon rainforest in South America covered 6.42 million square kilometers in 1994. In 2014, it covered only $$\frac{50}{59}$$ as much. Which is closest to the area of the Amazon forest in 2014?

• 6.4 million km2

• 5.4 million km2

• 4.4 million km2

• 3.4 million km2

Draw

In a 80-meter hurdle race, there are 8 equally-spaced hurdles on the track. The first hurdle is 12 meters from the start line and the last hurdle is 15.5 meters from the finish line. Draw a diagram to show the information in this situation.

Open Ended

In a 80-meter hurdle race, there are 8 equally-spaced hurdles on the track. The first hurdle is 12 meters from the start line and the last hurdle is 15.5 meters from the finish line. Calculate how far the hurdles are from one another. Show your reasoning.

Open Ended

To qualify for a popular game show, a candidate needs to take 5 tests and earn at least 90 percent of the total number of points possible. The table shows a candidate's results before the final qualifying test. Does the candidate have 95% of the total possible points before the final test? Explain or show your reasoning.

Open Ended

To qualify for a popular game show, a candidate needs to take 5 tests and earn at least 90 percent of the total number of points possible. The table shows a candidate's results before the final qualifying test. The candidate thinks that if they get at least 92 out of 100 on the final test, they will qualify. Do you agree? Explain your reasoning.