Grade 3 Base Ten Operations Practice — Easy

Question 1 of 26Score 0/0Easy

Question 1 of 26: Round 43 to the nearest 10.

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Keep going: Read the lesson: Rounding to the Nearest 10 or 100 Addition & Subtraction Steps Multiplication Grid
Answer key for parents & teachers (26 questions)
  1. Round 43 to the nearest 10. — 40. Ones digit is 3 (less than 5) → round DOWN → 40!
  2. Round 67 to the nearest 10. — 70. Ones digit is 7 (5 or more) → round UP → 70!
  3. Round 85 to the nearest 10. — 90. Ones digit is 5 (5 or more) → round UP → 90!
  4. Round 234 to the nearest 100. — 200. Tens digit is 3 (less than 5) → round DOWN → 200!
  5. Round 678 to the nearest 100. — 700. Tens digit is 7 (5 or more) → round UP → 700!
  6. Round 350 to the nearest 100. — 400. Tens digit is 5 (5 or more) → round UP → 400!
  7. Which ones digits cause you to round UP to the nearest 10? — 5, 6, 7, 8, 9. Ones digits 5, 6, 7, 8, or 9 → round UP!
  8. Which digit do you look at to round to the nearest 10? — Ones digit. To round to the nearest 10, look at the ONES digit!
  9. Which digit do you look at to round to the nearest 100? — Tens digit. To round to the nearest 100, look at the TENS digit!
  10. What is 356 + 247? — 603. Ones: 6+7=13 (write 3, carry 1). Tens: 5+4+1=10 (write 0, carry 1). Hundreds: 3+2+1=6. Answer: 603!
  11. What is 648 + 275? — 923. Ones: 8+5=13 (write 3, carry 1). Tens: 4+7+1=12 (write 2, carry 1). Hundreds: 6+2+1=9. Answer: 923!
  12. What is 500 + 300? — 800. 500 + 300 = 800. Add the hundreds: 5 + 3 = 8 hundreds!
  13. What is 700 − 400? — 300. 700 − 400 = 300. Subtract the hundreds: 7 − 4 = 3 hundreds!
  14. What is 421 + 365? — 786. Ones: 1+5=6. Tens: 2+6=8. Hundreds: 4+3=7. Answer: 786!
  15. True or False: When adding, you should always start with the ones column. — True — it is the standard algorithm. True! The standard algorithm starts with ONES, then tens, then hundreds!
  16. What is 750 + 250? — 1000. 750 + 250 = 1000. The ones cancel; 5+2=7 tens → but carry: 1000!
  17. What is 9 × 60? — 540. 9 × 6 = 54. Attach one zero → 540!
  18. What is 7 × 50? — 350. 7 × 5 = 35. Attach one zero → 350!
  19. What is 4 × 80? — 320. 4 × 8 = 32. Attach one zero → 320!
  20. What is 6 × 30? — 180. 6 × 3 = 18. Attach one zero → 180!
  21. What is 3 × 70? — 210. 3 × 7 = 21. Attach one zero → 210!
  22. What is 5 × 40? — 200. 5 × 4 = 20. Attach one zero → 200!
  23. What is 8 × 90? — 720. 8 × 9 = 72. Attach one zero → 720!
  24. What is 2 × 60? — 120. 2 × 6 = 12. Attach one zero → 120!
  25. What is 4 × 70? — 280. 4 × 7 = 28. Attach one zero → 280!
  26. True or False: 5 × 20 = 100. — True. True! 5 × 2 = 10; attach zero → 100!