## Envision Math Grade 5 Answer Key Topic 2 Test Prep

Envision Math 5th Grade Textbook Answer Key Topic 2 Test Prep Test prep Question 1. The Chen family’s home has 1,515 square feet downstairs and 625 square feet upstairs. Which of the following is the best estimate of the total square footage in the home? (2-3) A. 2,100 B. 2,200 C. 2,300 D. 2,500 Answer: Question 2. What is 2.934 rounded to the nearest hundredth? (2-2) A. 2.90 B. 2.93 C. 2.94 D. 3.00 Answer: Question 3. Eduardo is training for a marathon. He ran his first mile in 12.567 minutes and his second mile in 12.977 minutes. What is his combined time for the first two miles? (2-5) A. 24.434 minutes B. 24.544 minutes C. 25.444 minutes D. 25.544 minutes Answer: Question 4. To add 18 + 25 using mental math, Braxton did the following. What is the missing number that makes the statement true? A. 43 B. 25 C. 20 D. 2 Answer: Question 5. Which two trails combined are less than 4 miles? Use estimation to decide. (2-3) A. Red and Yellow B. Blue and Green C. Red and Green D. Blue and Yellow Answer: Question 6. The Thomas Jefferson Memorial is on 18.36 acres of land…

## Envision Math Grade 5 Answer Key Topic 2.7 Problem Solving

Envision Math 5th Grade Textbook Answer Key Topic 2.7 Problem Solving Problem Solving Draw a Picture and Write an Equation Three friends have music collections. How many more CDs does Susan have than Larry? Another Example Rori had some balloons and then gave 35 of them away. She now has 21 left. How many balloons did Rori have to begin with? One Way Think The total is unknown. 35 were given away and 21 are left. Write an Equation x – 35 = 21 21 + 35 = 56, so 56 is the total. x = 56 Another Way Think 35 were given away. Rori has 21 left. The total is unknown. Write an Equation 35 + 21 = x 35 + 21 = 56, so 56 is the total. x = 56 Rori had 56 balloons to begin with. Explain It Question 1. Why do both ways use addition to solve for x? Answer: Question 2. How can you check if 56 is a reasonable answer? Answer: Read and Understand What do I know? Susan has 42 CDs and Larry has 26 CDs. What am I asked to find? The difference between the number of CDs from these two…

## Envision Math Grade 5 Answer Key Topic 2.6 Subtracting Decimals

Envision Math 5th Grade Textbook Answer Key Topic 2.6 Subtracting Decimals Subtracting Decimals How can you subtract decimals? What is the difference in the wingspans of the two butterflies? Choose an Operation Subtract to find the difference. Find 5.92 – 4.37. Estimate: 6 – 4 = 2 Other Examples Using 0 as a placeholder Find 49.59 – 7.9 Using 0 as a placeholder Find 24.6 – 8.27. Subtracting Money Find $26.32 –$5.75. Guided Practice* In 1 through 8, subtract the decimals. Do you know how? Question 1. Answer: Question 2. Answer: Question 3. Answer: Question 4. Answer: Question 5. 56.8 – 2.765 Answer: Question 6. $43.80 –$16.00 Answer: Question 7. 22.4 – 10.7 8. Answer: Question 8. $36.40 –$21.16 Answer: Do you understand? Question 9. Reasonableness Explain why 1.55 cm is a reasonable answer for the difference in the wingspans of the two butterflies. Answer: Question 10. In the Other Examples above, is the value of 7.9 changed when you annex a zero after 7.9? Why or why not? Answer: Question 11. Writing to Explain How is finding 9.12 – 4.8 similar to finding $9.12 –$4.80? How is it different? Step 1 Write the numbers, lining…

## Envision Math Grade 5 Answer Key Topic 2.5 Adding Decimals

Envision Math 5th Grade Textbook Answer Key Topic 2.5 Adding Decimals Adding Decimals How can you add decimals? What was the combined time for the first two legs of the relay race? Choose an Operation Add to join groups. Find 21.49 + 21.59. Estimate: 21 + 22 = 43 Guided Practice* Do you know HOW? In 1 through 6, add the decimals. Question 1. 0.82 + 4.21 Answer: Question 2. 9.1 + 7.21 Answer: Question 3. 9.7 + 0.24 Answer: Question 4. 3.28 + 6.09 Answer: Question 5. 0.26 + 8.3 Answer: Question 6. 4.98 + 3.02 Answer: Do you UNDERSTAND? Question 7. Reasonableness How do you know the total time for the first two legs of the race is reasonable? Answer: Question 8. Writing to Explain How is finding $4.25 +$3.50 like finding 4.25 + 3.5? How is it different? Answer: Independent Practice In 9 through 26, add the decimals. Question 9. Answer: Question 10. Answer: Question 11. Answer: Question 12. Answer: Question 13. Answer: Question 14. Answer: Question 15. Answer: Question 16. Answer: Question 17. Answer: Question 18. Answer: Question 19. Answer: Question 20. Answer: Question 21. $271.90 +$34.22 22. Answer: Question 22. 658.2 + 0…