← 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 32 · 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. 1.69 + ? = 100
  2. 2.84 + ? = 100
  3. 3.62 + ? = 100
  4. 4.4 + ? = 10
  5. 5.2 + ? = 10
  6. 6.6 + ? = 10
  7. 7.5 + ? = 10
  8. 8.3 + ? = 10
  9. 9.1 + ? = 10
  10. 10.8 + ? = 10
  11. 11.46 + ? = 100
  12. 12.66 + ? = 100
  13. 13.57 + ? = 100
  14. 14.40 + ? = 100
  15. 15.36 + ? = 100
  16. 16.74 + ? = 100
  17. 17.7 + ? = 10
  18. 18.49 + ? = 100
  19. 19.18 + ? = 100
  20. 20.9 + ? = 10
  21. 21.19 + ? = 100
  22. 22.41 + ? = 100
  23. 23.87 + ? = 100
  24. 24.13 + ? = 100
  25. 25.77 + ? = 100
  26. 26.89 + ? = 100
  27. 27.25 + ? = 100
  28. 28.12 + ? = 100
  29. 29.16 + ? = 100
  30. 30.81 + ? = 100
  31. 31.28 + ? = 100
  32. 32.61 + ? = 100
  33. 33.65 + ? = 100
  34. 34.27 + ? = 100
  35. 35.23 + ? = 100
  36. 36.39 + ? = 100
  37. 37.33 + ? = 100
  38. 38.42 + ? = 100
  39. 39.68 + ? = 100
  40. 40.15 + ? = 100

Answer key

  1. 31
  2. 16
  3. 38
  4. 6
  5. 8
  6. 4
  7. 5
  8. 7
  9. 9
  10. 2
  11. 54
  12. 34
  13. 43
  14. 60
  15. 64
  16. 26
  17. 3
  18. 51
  19. 82
  20. 1
  21. 81
  22. 59
  23. 13
  24. 87
  25. 23
  26. 11
  27. 75
  28. 88
  29. 84
  30. 19
  31. 72
  32. 39
  33. 35
  34. 73
  35. 77
  36. 61
  37. 67
  38. 58
  39. 32
  40. 85

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