Question

spiral review (5.nbt.3b, 5.nbt.5, 5.nbt.6, 5.nbt.7)

1. at the deli, one pound of turkey costs $7.98. mr. epstein buys 3 pounds of turkey. how much will the turkey cost?
2. mrs. cho drives 45 miles in 1 hour. if her speed stays constant, how many hours will it take for her to drive 405 miles?
3. write the following numbers in order from least to greatest.

1.23; 1.2; 2.31; 3.2

1. over the weekend, aiden spent 15 minutes on his math homework. he spent three times as much time on his science homework. how much time did aiden spend on his science homework?

Explanation:

Question 3

Step1: Identify the cost per pound and the number of pounds.

The cost per pound of turkey is $7.98, and Mr. Epstein buys 3 pounds.

Step2: Multiply the cost per pound by the number of pounds.

To find the total cost, we use the formula: Total Cost = Cost per Pound × Number of Pounds. So, we calculate \( 7.98\times3 \).
\( 7.98\times3 = 23.94 \)

Step1: Identify the speed and the total distance.

Mrs. Cho's speed is 45 miles per hour, and the total distance she needs to drive is 405 miles.

Step2: Use the formula Time = Distance / Speed.

We know that speed \( v=\frac{d}{t} \), so \( t = \frac{d}{v} \). Substituting the values, we get \( t=\frac{405}{45} \).
\( \frac{405}{45}=9 \)

Step1: Compare the whole number parts first.

For the numbers 1.23, 1.2, 2.31, 3.2:

• The whole number part of 1.23 and 1.2 is 1.
• The whole number part of 2.31 is 2.
• The whole number part of 3.2 is 3.

Step2: Compare the decimal parts for numbers with the same whole number part.

For 1.23 and 1.2:

• 1.2 can be written as 1.20.
• Comparing the hundredths place: 0 (in 1.20) is less than 3 (in 1.23), so 1.2 < 1.23.

Step3: Order the numbers from least to greatest.

Now, ordering the numbers based on the whole number parts and decimal parts: 1.2, 1.23, 2.31, 3.2.

Answer:

The turkey will cost $23.94.

Question 4