1. Grade 5 – Unit 2 Estimation and Computation
Everyday Mathematics
Grade 5 – Unit 2
Estimation and Computation

2. 2.1 Estimation Challenge
If you were measuring the length of a school bus, would you use inches, feet, or yards? Why?
Use the unit of measure you chose to estimate the length of a school bus.

3. 2.2 Addition of Whole Numbers and Decimals
Use the information on Student Reference Book, pages to solve the Check Your Understanding Problems on the bottom of page 30.

4. 2.3 Subtraction of Whole Numbers and Decimals
Solve each problem
81-47= ? – 4.7 = ?
Describe how the two problems are alike and different.

5. 2.4 Addition and Subtraction Number Stories
Niko has $ Does he have enough money to buy 3 fancy pencils for $1.98 each and an eraser for $1.73?
What is the total cost of 3 pencils and 1 eraser?

6. 2.5 Estimate Your Reaction Time
Cut out the Grab-It Gauge on Activity Sheet 2 in your math journal.

7. 2.6 Chance Events
Survey the class for the results of the home experiments. Ask your classmates:
What true statements can you make to compare the results of your home experiment with the class experiment?

8. 2.7 Estimating Products
Use the numbers 10, 6, 9, 8, and 5 to make expressions that are equivalent names for 1, 10, and Use addition, subtraction, multiplication, division, or exponents, and try to use all 5 numbers.
Record your expression on the class
name-collection box for that
number.

9. 2.8 Multiplication of Whole Numbers and Decimals
Estimate the solution to this problem. Write a number sentence to show how you found your estimate.
3.7 * 6.2

10. 2.9 The Lattice Method of Multiplication
Study the problems in column A on journal page 54. Then use lattice multiplication to solve the problems in column B.

11. 2.10 Comparing Millions, Billions, and Trillions
Explain the strategy you would use to find the number of minutes in a year.

12. 2.11 Progress Check 2
Complete the Self Assessment.