← 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 467 · 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. 1.78 + ? = 100
  2. 2.66 + ? = 100
  3. 3.16 + ? = 100
  4. 4.5 + ? = 10
  5. 5.6 + ? = 10
  6. 6.52 + ? = 100
  7. 7.13 + ? = 100
  8. 8.42 + ? = 100
  9. 9.48 + ? = 100
  10. 10.31 + ? = 100
  11. 11.28 + ? = 100
  12. 12.2 + ? = 10
  13. 13.1 + ? = 10
  14. 14.26 + ? = 100
  15. 15.87 + ? = 100
  16. 16.81 + ? = 100
  17. 17.3 + ? = 10
  18. 18.47 + ? = 100
  19. 19.21 + ? = 100
  20. 20.39 + ? = 100
  21. 21.17 + ? = 100
  22. 22.82 + ? = 100
  23. 23.7 + ? = 10
  24. 24.25 + ? = 100
  25. 25.15 + ? = 100
  26. 26.19 + ? = 100
  27. 27.33 + ? = 100
  28. 28.9 + ? = 10
  29. 29.8 + ? = 10
  30. 30.67 + ? = 100
  31. 31.30 + ? = 100
  32. 32.60 + ? = 100
  33. 33.69 + ? = 100
  34. 34.23 + ? = 100
  35. 35.83 + ? = 100
  36. 36.63 + ? = 100
  37. 37.75 + ? = 100
  38. 38.40 + ? = 100
  39. 39.43 + ? = 100
  40. 40.55 + ? = 100

Answer key

  1. 22
  2. 34
  3. 84
  4. 5
  5. 4
  6. 48
  7. 87
  8. 58
  9. 52
  10. 69
  11. 72
  12. 8
  13. 9
  14. 74
  15. 13
  16. 19
  17. 7
  18. 53
  19. 79
  20. 61
  21. 83
  22. 18
  23. 3
  24. 75
  25. 85
  26. 81
  27. 67
  28. 1
  29. 2
  30. 33
  31. 70
  32. 40
  33. 31
  34. 77
  35. 17
  36. 37
  37. 25
  38. 60
  39. 57
  40. 45

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