Multiplication Boost Test
Modified Assessment
Multiplication Power Test
Chapter 2 • Multiplying Whole Numbers & Powers of 10
Name:
Date: Score:
Helpful Tip: Multiply the basic facts first, then count and attach the zeros!
Take your time • Show all your work
1
Mental Math: Multiples of 10
Multiply basic facts, then count zeros.
- Basic fact: 7 × 3 = 21
70 × 300 =
answer
- Basic fact: 21 × 1 = 21
21 × 100 =
answer
- Basic fact: 8 × 5 = 40
8 × 500 =
answer
- 10³ = 1,000
6 × 10³ =
answer
2
Powers & Exponents
The exponent shows how many times to multiply the base.
5. Write using an exponent:
5 × 5 × 5 × 5 =
5
?
(Write the small exponent in the box)
6. Find the value:
What does \(10^2\) equal? (Remember: \(10 \times 10\))
10² =
answer
3
Estimate by Rounding
Round to the nearest ten first, then multiply.
7. Estimate: 63 × 51
63 rounds to:
51 rounds to:
Estimate:
8. Estimate: 7 × 89
Keep: 7
89 rounds to:
Estimate:
9. Estimate: 9 × 31
Keep: 9
31 rounds to:
Estimate:
10. Estimate: 18 × 91
18 rounds to:
91 rounds to:
Estimate:
Grade 5 • Chapter 2 Multiply Whole Numbers (Modified) Page 1 of 2 Turn page to continue →
Multiplication Power Test • Form 3A (Modified Support)
Student Name:
4
Multiply: Show Your Work
Line up digits carefully in the work boxes.
11. Multiply: 124 × 6 3-digit by 1-digit
Hundreds / Tens / Ones
1 2 4
× 6
Product:
12. Multiply: 315 × 40 Zero trick: write 0 first
Step 1: bring down 0
3 1 5
× 4 0
Product:
13. Multiply: 36 × 24 2 partial products
3 6
× 2 4
Add partial products
Product:
14. Multiply: 142 × 23 Remember place holder 0
1 4 2
× 2 3
Don't forget regrouping
Product:
5
Problem Solving
Read the problem, write an equation, and solve.
15. Crayon Boxes 1-Step Problem
Felisa bought 18 boxes of crayons. Each box holds 12 crayons. How many crayons did Felisa buy in all?
Workspace / Equation:
Answer:
crayons
16. Stamp Collection 1-Step Problem
Derrick has 135 stamps in one album. How many stamps will he have in 4 albums of the same size?
Workspace / Equation:
Answer:
stamps
17. Saving for a Laptop (Guided 2-Step) Follow Step A & Step B
Marcus wants to buy a computer that costs $600. He saves $75 each month for 7 months.
Step A: How much total money did Marcus save?
$75 × 7 months =
Total saved:
$
Step B: Does he have enough to buy the $600 computer?
YES
NO
Explain why:
Test Check: Did you write all partial products and double-check your addition?
Student Sign-off:
Grade 5 • Chapter 2 Multiply Whole Numbers (Modified) Page 2 of 2 Complete!
Multiplication Boost Answer Key
Teacher Resource • Form 3A Modified
Multiplication Power Answer Key
Full Solutions, Point Values, and Diagnostic Remediation Notes
Total Points
30 Points
Grading scale: 80%+ Proficient
Part 1 & 2: Mental Math & Powers 6 Items • 12 Points (2 pts each)
Part 3: Rounding / Estimation 4 Items • 8 Points (2 pts each)
Part 4 & 5: Multiply & Word Problems 7 Items • 10 Points (Page 2)
1
Part 1: Mental Math Solutions (2 pts each)
1. 70 × 300
Fact: 7 × 3 = 21, plus 3 zeros
21,000
2. 21 × 100
Fact: 21 × 1 = 21, plus 2 zeros
2,100
3. 8 × 500
Fact: 8 × 5 = 40, plus 2 zeros (40 + 00)
4,000
4. 6 × 10³
10³ = 1,000; 6 × 1,000 = 6,000
6,000
2
Part 2: Powers & Exponents Solutions (2 pts each)
5. 5 × 5 × 5 × 5
The factor 5 appears 4 times
5⁴ (exponent = 4)
6. Value of 10²
10 × 10 = 100 (1 with 2 zeros)
100
3
Part 3: Rounding & Estimation Solutions (2 pts each)
1 pt for rounded factors, 1 pt for final product
7. Estimate 63 × 51 3,000
63 rounds to 60; 51 rounds to 50.
60 × 50 = 3,000
8. Estimate 7 × 89 630
Keep 7; 89 rounds to 90.
7 × 90 = 630
9. Estimate 9 × 31 270
Keep 9; 31 rounds to 30.
9 × 30 = 270
10. Estimate 18 × 91 1,800
18 rounds to 20; 91 rounds to 90.
20 × 90 = 1,800
Diagnostic Remediation Guide (Page 1)
Zero Confusion in #3 (8 × 500 = 4,000): Students frequently write 400 because 40 already ends in zero. Remind them: \(8 \times 5 = 40\); then append the two additional zeros from 500 \(\rightarrow\) 4,000.
Exponent Confusion in #5 & #6: Below-grade learners often multiply base by exponent (e.g., writing \(5 \times 4 = 20\) or \(10 \times 2 = 20\)). Emphasize that exponents denote repeated multiplication.
Grade 5 • Chapter 2 Multiply Whole Numbers Answer Key Page 1 of 2 Turn for Multi-Digit & Word Problem Solutions →
Multiplication Power Answer Key • Page 2: Standard Algorithms & Applications
