← 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 422 · 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. 1.9 + ? = 10
  2. 2.80 + ? = 100
  3. 3.3 + ? = 10
  4. 4.32 + ? = 100
  5. 5.46 + ? = 100
  6. 6.56 + ? = 100
  7. 7.87 + ? = 100
  8. 8.59 + ? = 100
  9. 9.42 + ? = 100
  10. 10.6 + ? = 10
  11. 11.43 + ? = 100
  12. 12.17 + ? = 100
  13. 13.1 + ? = 10
  14. 14.82 + ? = 100
  15. 15.2 + ? = 10
  16. 16.4 + ? = 10
  17. 17.7 + ? = 10
  18. 18.48 + ? = 100
  19. 19.66 + ? = 100
  20. 20.12 + ? = 100
  21. 21.13 + ? = 100
  22. 22.61 + ? = 100
  23. 23.23 + ? = 100
  24. 24.11 + ? = 100
  25. 25.76 + ? = 100
  26. 26.89 + ? = 100
  27. 27.22 + ? = 100
  28. 28.29 + ? = 100
  29. 29.8 + ? = 10
  30. 30.77 + ? = 100
  31. 31.5 + ? = 10
  32. 32.57 + ? = 100
  33. 33.68 + ? = 100
  34. 34.81 + ? = 100
  35. 35.24 + ? = 100
  36. 36.31 + ? = 100
  37. 37.49 + ? = 100
  38. 38.62 + ? = 100
  39. 39.65 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 1
  2. 20
  3. 7
  4. 68
  5. 54
  6. 44
  7. 13
  8. 41
  9. 58
  10. 4
  11. 57
  12. 83
  13. 9
  14. 18
  15. 8
  16. 6
  17. 3
  18. 52
  19. 34
  20. 88
  21. 87
  22. 39
  23. 77
  24. 89
  25. 24
  26. 11
  27. 78
  28. 71
  29. 2
  30. 23
  31. 5
  32. 43
  33. 32
  34. 19
  35. 76
  36. 69
  37. 51
  38. 38
  39. 35
  40. 73

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