← 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 432 · 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. 1.7 + ? = 10
  2. 2.5 + ? = 10
  3. 3.17 + ? = 100
  4. 4.27 + ? = 100
  5. 5.32 + ? = 100
  6. 6.28 + ? = 100
  7. 7.48 + ? = 100
  8. 8.3 + ? = 10
  9. 9.26 + ? = 100
  10. 10.2 + ? = 10
  11. 11.8 + ? = 10
  12. 12.4 + ? = 10
  13. 13.36 + ? = 100
  14. 14.1 + ? = 10
  15. 15.35 + ? = 100
  16. 16.12 + ? = 100
  17. 17.83 + ? = 100
  18. 18.50 + ? = 100
  19. 19.55 + ? = 100
  20. 20.9 + ? = 10
  21. 21.64 + ? = 100
  22. 22.57 + ? = 100
  23. 23.85 + ? = 100
  24. 24.54 + ? = 100
  25. 25.6 + ? = 10
  26. 26.39 + ? = 100
  27. 27.20 + ? = 100
  28. 28.61 + ? = 100
  29. 29.69 + ? = 100
  30. 30.29 + ? = 100
  31. 31.56 + ? = 100
  32. 32.86 + ? = 100
  33. 33.84 + ? = 100
  34. 34.81 + ? = 100
  35. 35.11 + ? = 100
  36. 36.60 + ? = 100
  37. 37.59 + ? = 100
  38. 38.70 + ? = 100
  39. 39.25 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 3
  2. 5
  3. 83
  4. 73
  5. 68
  6. 72
  7. 52
  8. 7
  9. 74
  10. 8
  11. 2
  12. 6
  13. 64
  14. 9
  15. 65
  16. 88
  17. 17
  18. 50
  19. 45
  20. 1
  21. 36
  22. 43
  23. 15
  24. 46
  25. 4
  26. 61
  27. 80
  28. 39
  29. 31
  30. 71
  31. 44
  32. 14
  33. 16
  34. 19
  35. 89
  36. 40
  37. 41
  38. 30
  39. 75
  40. 13

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