Grade 1 Base Ten Operations Practice

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Question 1 of 42: Which number is NOT between 100 and 120?

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Keep going: Read the lesson: Counting to 120 Visual Object Counter Number Line Plotter
Answer key for parents & teachers (42 questions)
  1. Which number is NOT between 100 and 120? — 125. 125 is greater than 120 and is not between 100 and 120.
  2. True or False: 100 has three digits. — True. 100 has three digits: 1, 0, and 0. True!
  3. Arrange in order: 118, 115, 110, 120. What is the smallest? — 110. 110 is the smallest of the four numbers.
  4. Arrange in order: 118, 115, 110, 120. What is the largest? — 120. 120 is the largest of the four numbers.
  5. How is 105 different from 150? — 105 < 150. 105 < 150. One hundred five is less than one hundred fifty.
  6. What number has a 1 in the hundreds place, a 1 in the tens place, and a 5 in the ones place? — 115. 1 hundred + 1 ten + 5 ones = 115.
  7. What number is 3 more than 117? — 120. 117 + 3 = 120.
  8. What number is 5 less than 120? — 115. 120 − 5 = 115.
  9. How many 5s do you need to reach 35? — 7. 5, 10, 15, 20, 25, 30, 35 — that is 7 fives.
  10. Skip count by 2s: what is the 8th number? — 16. 2, 4, 6, 8, 10, 12, 14, 16 — the 8th number is 16.
  11. Skip count by 5s: what is the 6th number? — 30. 5, 10, 15, 20, 25, 30 — the 6th number is 30.
  12. True or False: 14 is reached when skip counting by 2s starting at 2. — True. 2, 4, 6, 8, 10, 12, 14 — Yes, 14 is in the skip-count-by-2 sequence!
  13. True or False: 22 is reached when skip counting by 5s. — False. Skip counting by 5s only lands on numbers ending in 0 or 5. 22 ends in 2 — False!
  14. You have 5 bags with 5 apples each. Count by 5s to find the total. — 25. 5, 10, 15, 20, 25 — counting by 5s five times gives 25 apples.
  15. What number is 3 hops of 2 from 10? — 16. 10 + 2 + 2 + 2 = 16. Three hops of 2 from 10 reaches 16.
  16. What number is 4 hops of 5 from 0? — 20. 5, 10, 15, 20 — four hops of 5 from 0 reaches 20.
  17. A store has 6 shelves. Each shelf holds 2 books. How many books in all? Use skip counting. — 12. 2, 4, 6, 8, 10, 12 — skip counting by 2 six times gives 12 books.
  18. True or False: The number 59 has 5 ones and 9 tens. — False. False. 59 has 5 TENS and 9 ONES — the tens digit is on the left!
  19. What is the VALUE of the 6 in the number 68? — 60. The 6 is in the tens place, so its value is 6 × 10 = 60.
  20. What is the VALUE of the 2 in the number 29? — 20. The 2 is in the tens place, so its value is 2 × 10 = 20.
  21. 54 = ___ tens + ___ ones — 5 tens + 4 ones. 54: the 5 is in the tens place (5 tens) and the 4 is in the ones place (4 ones).
  22. Which two numbers have the same TENS digit? — 52 and 57. 52 has 5 tens and 57 has 5 tens — same tens digit!
  23. A bag has 6 packs of 10 crayons and 7 single crayons. How many crayons in all? — 67. 6 tens = 60 plus 7 ones = 7. Total: 60 + 7 = 67 crayons.
  24. Which number has MORE tens: 74 or 47? — 74. 74 has 7 tens. 47 has 4 tens. 7 > 4, so 74 has more tens.
  25. If you have 10 ones, how many tens do you have? — 1. 10 ones can be bundled into 1 ten!
  26. Does 47 + 6 require regrouping? — Yes, because 7 + 6 = 13 ≥ 10. 7 + 6 = 13. Since 13 ≥ 10, we regroup (carry 1 ten)!
  27. What is 27 + 8? — 35. 7 + 8 = 15 = 1 ten + 5 ones. 2 + 1 = 3 tens. Answer: 35.
  28. What is 58 + 6? — 64. 8 + 6 = 14 = 1 ten + 4 ones. 5 + 1 = 6 tens. Answer: 64.
  29. What is 19 + 9? — 28. 9 + 9 = 18 = 1 ten + 8 ones. 1 + 1 = 2 tens. Answer: 28.
  30. True or False: Adding a one-digit number to a two-digit number always changes the tens digit. — Only when regrouping. The tens digit only changes when the ones add up to 10 or more (regrouping). Otherwise the tens stay the same.
  31. What is 76 + 6? — 82. 6 + 6 = 12 = 1 ten + 2 ones. 7 + 1 = 8 tens. Answer: 82.
  32. A jar has 48 coins. You add 5 more. How many coins now? — 53. 8 + 5 = 13 = 1 ten + 3 ones. 4 + 1 = 5 tens. Total: 53 coins.
  33. There are 62 pages read. You read 9 more. How many pages in all? — 71. 2 + 9 = 11 = 1 ten + 1 one. 6 + 1 = 7 tens. Total: 71 pages.
  34. What is 33 + 7? — 40. 3 + 7 = 10 = 1 ten + 0 ones. 3 + 1 = 4 tens. Answer: 40.
  35. What is 54 + 9? — 63. 4 + 9 = 13 = 1 ten + 3 ones. 5 + 1 = 6 tens. Answer: 63.
  36. What is 47 + 6? — 53. 7 + 6 = 13 = 1 ten + 3 ones. 4 + 1 = 5 tens. Answer: 53.
  37. Compare 72 and 78. Which symbol is correct? — 72 < 78. Both have 7 tens, so compare ones: 2 < 8. So 72 < 78!
  38. Put in order from least to greatest: 32, 23, 30. — 23, 30, 32. Tens: 2, 3, 3. Since 23 < 30 < 32, the order is 23, 30, 32.
  39. True or False: 99 > 100 — False. 99 < 100. One hundred is greater than ninety-nine!
  40. Two numbers have the same tens digit but different ones. Which is greater? — The one with larger ones. Same tens means we compare ones. More ones = greater number!
  41. Maria has 37 stickers. Liam has 73. Who has more? — Liam (73). Tens: 3 < 7. So 37 < 73. Liam has more stickers!
  42. True or False: A number with more tens is always greater. — True. For two-digit numbers, a larger tens digit always means a greater number!