← Number bonds to 10 and 100 lesson New set →

Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 403 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.13 + ? = 100
  2. 2.2 + ? = 10
  3. 3.6 + ? = 10
  4. 4.20 + ? = 100
  5. 5.8 + ? = 10
  6. 6.56 + ? = 100
  7. 7.9 + ? = 10
  8. 8.69 + ? = 100
  9. 9.7 + ? = 10
  10. 10.3 + ? = 10
  11. 11.11 + ? = 100
  12. 12.35 + ? = 100
  13. 13.57 + ? = 100
  14. 14.5 + ? = 10
  15. 15.87 + ? = 100
  16. 16.24 + ? = 100
  17. 17.65 + ? = 100
  18. 18.52 + ? = 100
  19. 19.41 + ? = 100
  20. 20.21 + ? = 100
  21. 21.68 + ? = 100
  22. 22.4 + ? = 10
  23. 23.33 + ? = 100
  24. 24.14 + ? = 100
  25. 25.17 + ? = 100
  26. 26.44 + ? = 100
  27. 27.86 + ? = 100
  28. 28.66 + ? = 100
  29. 29.43 + ? = 100
  30. 30.51 + ? = 100
  31. 31.1 + ? = 10
  32. 32.62 + ? = 100
  33. 33.85 + ? = 100
  34. 34.54 + ? = 100
  35. 35.82 + ? = 100
  36. 36.15 + ? = 100
  37. 37.36 + ? = 100
  38. 38.49 + ? = 100
  39. 39.28 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 87
  2. 8
  3. 4
  4. 80
  5. 2
  6. 44
  7. 1
  8. 31
  9. 3
  10. 7
  11. 89
  12. 65
  13. 43
  14. 5
  15. 13
  16. 76
  17. 35
  18. 48
  19. 59
  20. 79
  21. 32
  22. 6
  23. 67
  24. 86
  25. 83
  26. 56
  27. 14
  28. 34
  29. 57
  30. 49
  31. 9
  32. 38
  33. 15
  34. 46
  35. 18
  36. 85
  37. 64
  38. 51
  39. 72
  40. 62

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths