Grade: 4 Subject: Math Unit: Multi-Digit Multiplication Lesson: 6 of 6 SAT: Algebra ACT: Math

Unit Quiz

Instructions

This quiz covers all the skills you have learned in the Multi-Digit Multiplication unit. Take your time and show your work on scratch paper.

Quiz Overview

  • Questions: 10
  • Topics covered: 2-digit multiplication, 3-digit multiplication, word problems, and error checking
  • Tip: Use estimation to check if your answers are reasonable

Scoring Guide

  • 9-10 correct: Excellent! You have mastered multi-digit multiplication.
  • 7-8 correct: Good work! Review any topics you missed.
  • 5-6 correct: Keep practicing. Review the lessons and try again.
  • 0-4 correct: Go back through the unit lessons before retaking the quiz.

Quiz Questions

Answer each question, then click to check your answer.

Question 1: What is 46 x 23?

Answer: 1,058

Solution: 46 x 3 = 138, and 46 x 20 = 920. Then 138 + 920 = 1,058.

Question 2: What is 185 x 14?

Answer: 2,590

Solution: 185 x 4 = 740, and 185 x 10 = 1,850. Then 740 + 1,850 = 2,590.

Question 3: A library has 32 shelves. Each shelf holds 45 books. How many books can the library hold in total?

Answer: 1,440 books

Solution: 32 x 45 = 32 x 5 + 32 x 40 = 160 + 1,280 = 1,440.

Question 4: What is 278 x 36?

Answer: 10,008

Solution: 278 x 6 = 1,668, and 278 x 30 = 8,340. Then 1,668 + 8,340 = 10,008.

Question 5: A factory produces 156 toys per hour. How many toys does the factory produce in a 15-hour day?

Answer: 2,340 toys

Solution: 156 x 15 = 156 x 5 + 156 x 10 = 780 + 1,560 = 2,340.

Question 6: What is 64 x 75?

Answer: 4,800

Solution: 64 x 5 = 320, and 64 x 70 = 4,480. Then 320 + 4,480 = 4,800.

Question 7: A student calculated 89 x 47 = 3,983. Is this correct? If not, what is the right answer?

Incorrect. Correct Answer: 4,183

Solution: 89 x 7 = 623, and 89 x 40 = 3,560. Then 623 + 3,560 = 4,183. The student made a carrying or addition error.

Question 8: What is 425 x 28?

Answer: 11,900

Solution: 425 x 8 = 3,400, and 425 x 20 = 8,500. Then 3,400 + 8,500 = 11,900.

Question 9: An office building has 24 floors. Each floor has 38 offices. How many offices are in the building?

Answer: 912 offices

Solution: 24 x 38 = 24 x 8 + 24 x 30 = 192 + 720 = 912.

Question 10: What is 567 x 43?

Answer: 24,381

Solution: 567 x 3 = 1,701, and 567 x 40 = 22,680. Then 1,701 + 22,680 = 24,381.

Check Your Results

Count how many questions you answered correctly and check your score against the scoring guide above.

  • If you scored 7 or higher, congratulations! You are ready to move on.
  • If you scored below 7, review the lessons in this unit and try the quiz again.

Next Steps

  • Review any questions you got wrong
  • If needed, go back to specific lessons for more practice
  • When ready, proceed to the next unit in Grade 4 Math