Grade 2 Base Ten Operations Practice

Question 1 of 39Score 0/0Medium

Question 1 of 39: Write the expanded form of 725.

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Keep going: Read the lesson: Three-Digit Place Value Number Line Plotter Addition & Subtraction Steps
Answer key for parents & teachers (39 questions)
  1. Write the expanded form of 725. — 700 + 20 + 5. 725 = 700 + 20 + 5. Each digit gets its place value.
  2. Which number has a 9 in the hundreds place? — 913. 913: 9 is hundreds, 1 is tens, 3 is ones. The hundreds digit is 9.
  3. What number has 4 hundreds, 0 tens, and 7 ones? — 407. 4 hundreds + 0 tens + 7 ones = 400 + 0 + 7 = 407.
  4. How many tens are in 350? — 35. 350 has 35 tens total (3 full hundreds = 30 tens, plus 5 tens = 35 tens).
  5. Which is the expanded form of 609? — 600 + 0 + 9. 609 = 600 + 0 + 9. The tens digit is 0, so we write 0 tens.
  6. What is the largest 3-digit number you can make? — 999. The largest 3-digit number is 999 (9 hundreds, 9 tens, 9 ones).
  7. What is the smallest 3-digit number? — 100. 100 is the smallest 3-digit number (1 hundred, 0 tens, 0 ones).
  8. In 843, how much MORE is the hundreds digit worth than the tens digit? — 760. Hundreds digit: 8 × 100 = 800. Tens digit: 4 × 10 = 40. 800 − 40 = 760 more.
  9. What number has 2 hundreds, 7 tens, and 5 ones? — 275. 2 hundreds + 7 tens + 5 ones = 200 + 70 + 5 = 275.
  10. In 530, what is the value of the digit 3? — 30. In 530, 3 is in the tens place: 3 × 10 = 30.
  11. Skip count by 2s starting at 0: What is the 6th number? — 10. 0, 2, 4, 6, 8, 10. The 6th number is 10.
  12. Skip count by 5s starting at 35: 35, 40, __, 50, 55. What is missing? — 45. 40 + 5 = 45. The sequence continues: 35, 40, 45, 50, 55.
  13. Skip count by 100s starting at 300: 300, __, 500. What is missing? — 400. 300 + 100 = 400. The sequence is 300, 400, 500.
  14. Which number is NOT in the skip-counting-by-5s sequence? — 47. 47 does not end in 0 or 5, so it is not in the count-by-5s sequence.
  15. I start at 50 and skip count backward by 10s. What are the next three numbers? — 40, 30, 20. 50 − 10 = 40, 40 − 10 = 30, 30 − 10 = 20. Subtracting 10 each time.
  16. How many 5s make 40? — 8. 5, 10, 15, 20, 25, 30, 35, 40 — that is 8 hops of 5. 8 × 5 = 40.
  17. How many 10s make 100? — 10. 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 — that is 10 hops. 10 × 10 = 100.
  18. Skip count by 2s: 14, 16, 18, __, 22. What is missing? — 20. 18 + 2 = 20. The pattern continues: 14, 16, 18, 20, 22.
  19. How many 100s make 700? — 7. 100, 200, 300, 400, 500, 600, 700 — that is 7 hops of 100.
  20. Skip count by 5s: What is the 10th number in the sequence starting at 5? — 50. Starting at 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50. The 10th is 50.
  21. What is 456 + 327? — 783. Ones: 6+7=13 (write 3, carry 1). Tens: 5+2+1=8. Hundreds: 4+3=7. Answer: 783.
  22. What is 638 − 415? — 223. Ones: 8−5=3, Tens: 3−1=2, Hundreds: 6−4=2. Answer: 223.
  23. What is 564 + 178? — 742. Ones: 4+8=12 (write 2, carry 1). Tens: 6+7+1=14 (write 4, carry 1). Hundreds: 5+1+1=7. Answer: 742.
  24. What is 800 − 356? — 444. 800 − 356: regroup as needed. 800 − 356 = 444.
  25. Which calculation requires regrouping in the ones column? — 456 + 327. 456 + 327: ones are 6+7=13, which is ≥10, so we regroup.
  26. What is 905 − 432? — 473. Ones: 5−2=3, Tens: 0−3 → need to regroup: borrow from hundreds. 10−3=7, hundreds: 9−1−4=4. Wait: 905−432: H:9−4=5, T:0−3 need borrow, borrow from hundreds: H becomes 8, T becomes 10, 10−3=7. Ones: 5−2=3. Answer: 473.
  27. What is 345 + 455? — 800. Ones: 5+5=10 (write 0, carry 1). Tens: 4+5+1=10 (write 0, carry 1). Hundreds: 3+4+1=8. Answer: 800.
  28. What is 275 + 425? — 700. Ones: 5+5=10 (0, carry 1). Tens: 7+2+1=10 (0, carry 1). Hundreds: 2+4+1=7. Answer: 700.
  29. What is the sum of 499 + 1? — 500. 499 + 1: Ones: 9+1=10 (0, carry 1). Tens: 9+0+1=10 (0, carry 1). Hundreds: 4+0+1=5. Answer: 500.
  30. Use a number line to add 23 + 15. Start at 23, jump right 15. Where do you land? — 38. 23 + 15 = 38. Jump right 15 from 23 lands on 38.
  31. Use a number line to subtract 50 − 18. Start at 50, jump left 18. Where do you land? — 32. 50 − 18 = 32. Jump left 18 from 50 lands on 32.
  32. On a number line, 45 is between which two tens? — 40 and 50. 45 is between 40 and 50 on the number line.
  33. How many equal steps of 5 does it take to get from 20 to 45 on a number line? — 5. 20, 25, 30, 35, 40, 45 — that is 5 jumps of 5.
  34. Which number is BETWEEN 62 and 71 on a number line? — 67. 67 is between 62 and 71 (62 < 67 < 71).
  35. On a number line, what does it mean when a number is "farther left"? — It is smaller. Farther left = smaller value. Numbers decrease as you move left.
  36. You start at 100 on a number line and take 4 jumps of 10 to the right. Where do you land? — 140. 100 + (4 × 10) = 100 + 40 = 140.
  37. A number line shows marks at 30, 40, 50, 60. What is the interval (step size)? — 10. 40 − 30 = 10. The interval between marks is 10.
  38. Which comparison is TRUE? (Use a number line.) — 55 > 45. 55 is to the right of 45 on the number line, so 55 > 45.
  39. On a number line from 0 to 100, where would you place 75? — Between 50 and 100, closer to 100. 75 is three-quarters of the way from 0 to 100, closer to the 100 end.