← 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 234 · 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. 1.2 + ? = 10
  2. 2.15 + ? = 100
  3. 3.9 + ? = 10
  4. 4.4 + ? = 10
  5. 5.32 + ? = 100
  6. 6.22 + ? = 100
  7. 7.20 + ? = 100
  8. 8.7 + ? = 10
  9. 9.12 + ? = 100
  10. 10.60 + ? = 100
  11. 11.35 + ? = 100
  12. 12.5 + ? = 10
  13. 13.1 + ? = 10
  14. 14.80 + ? = 100
  15. 15.82 + ? = 100
  16. 16.42 + ? = 100
  17. 17.3 + ? = 10
  18. 18.49 + ? = 100
  19. 19.89 + ? = 100
  20. 20.47 + ? = 100
  21. 21.67 + ? = 100
  22. 22.41 + ? = 100
  23. 23.8 + ? = 10
  24. 24.23 + ? = 100
  25. 25.86 + ? = 100
  26. 26.85 + ? = 100
  27. 27.84 + ? = 100
  28. 28.59 + ? = 100
  29. 29.25 + ? = 100
  30. 30.33 + ? = 100
  31. 31.65 + ? = 100
  32. 32.39 + ? = 100
  33. 33.81 + ? = 100
  34. 34.57 + ? = 100
  35. 35.14 + ? = 100
  36. 36.56 + ? = 100
  37. 37.88 + ? = 100
  38. 38.11 + ? = 100
  39. 39.29 + ? = 100
  40. 40.6 + ? = 10

Answer key

  1. 8
  2. 85
  3. 1
  4. 6
  5. 68
  6. 78
  7. 80
  8. 3
  9. 88
  10. 40
  11. 65
  12. 5
  13. 9
  14. 20
  15. 18
  16. 58
  17. 7
  18. 51
  19. 11
  20. 53
  21. 33
  22. 59
  23. 2
  24. 77
  25. 14
  26. 15
  27. 16
  28. 41
  29. 75
  30. 67
  31. 35
  32. 61
  33. 19
  34. 43
  35. 86
  36. 44
  37. 12
  38. 89
  39. 71
  40. 4

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