Envision Topic 1 5th grade

The cost of one DVD is $16.98, and the cost of another DVD is $9.29. Ed estimated the cost of the two DVDs to be about $27. Is his estimate higher or lower than the actual cost?

• His estimate is lower than the actual cost.

• His estimate is higher than the actual cost.

• His estimate is exactly the same as the actual cost.

• His estimate is much higher than the actual cost.

Higher Order Thinking: When organizing a field trip and each bus can seat up to 46 people, is it better to estimate a greater or lesser number than the actual number of people going on the field trip? Why?

• It is better to estimate a greater number to ensure there are enough seats for everyone.

• It is better to estimate a lesser number to save money on buses.

• It does not matter whether you estimate greater or lesser.

• It is better to estimate exactly the number of people going.

Three rock samples have masses of 74.05 grams, 9.72 grams, and 45.49 grams. A scientist estimates the total mass of the samples by rounding each mass to the nearest whole number. Which lists the numbers he will add?

• 75, 10, and 46

• 74.1, 9.7, and 45.5

• 74, 10, and 45

• 75, 10, and 50

• $5.00

• $7.00

• $13.00

• $17.00

Which two cities have the greatest combined rainfall for a typical year?

• Macon, GA and Springfield, MO

• Macon, GA and Bismarck, ND

• Bismarck, ND and Springfield, MO

• Bismarck, ND and Seattle, WA

Which location had less than 45 inches of rain but more than 40 inches of rain?

• Springfield, MO

• Dallas, TX

• Miami, FL

• Seattle, WA

Choose all expressions that are equal to 12.9.

• 0.02 + 12 + 0.88

• 0.06 + 12.03

• 11.9 + 1

• 6.2 + 3.4 + 2.3

• 3.01 + 2.01 + 7.7

Choose all expressions that are equal to 16.02.

• 16 + 0.02

• 3.42 + 8 + 4.6

• 16.01 + 1

• 12.06 + 3.14

• 7.36 + 8.66

Algebra: The Pyramid of Khafre measured 143.5 meters high. The Pyramid of Menkaure measured 65.5 meters high. Write and solve an equation to find d, the difference in the heights of these two pyramids.

• d = 143.5 - 65.5 = 78 meters

• d = 143.5 + 65.5 = 209 meters

• d = 65.5 - 143.5 = -78 meters

• d = 143.5 / 65.5 = 2.19 meters

Sue subtracted 2.9 from 20.9 and got 1.8. This is not reasonable because:

• 20.9 - 2.9 is actually 18, not 1.8.

• 2.9 is greater than 20.9.

• The answer should be less than 1.

• The subtraction should result in a negative number.