← 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 286 · 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. 1.1 + ? = 10
  2. 2.44 + ? = 100
  3. 3.83 + ? = 100
  4. 4.4 + ? = 10
  5. 5.6 + ? = 10
  6. 6.28 + ? = 100
  7. 7.67 + ? = 100
  8. 8.3 + ? = 10
  9. 9.9 + ? = 10
  10. 10.2 + ? = 10
  11. 11.69 + ? = 100
  12. 12.8 + ? = 10
  13. 13.51 + ? = 100
  14. 14.47 + ? = 100
  15. 15.73 + ? = 100
  16. 16.36 + ? = 100
  17. 17.32 + ? = 100
  18. 18.71 + ? = 100
  19. 19.88 + ? = 100
  20. 20.18 + ? = 100
  21. 21.7 + ? = 10
  22. 22.17 + ? = 100
  23. 23.77 + ? = 100
  24. 24.27 + ? = 100
  25. 25.34 + ? = 100
  26. 26.25 + ? = 100
  27. 27.5 + ? = 10
  28. 28.22 + ? = 100
  29. 29.45 + ? = 100
  30. 30.89 + ? = 100
  31. 31.33 + ? = 100
  32. 32.62 + ? = 100
  33. 33.11 + ? = 100
  34. 34.26 + ? = 100
  35. 35.43 + ? = 100
  36. 36.82 + ? = 100
  37. 37.70 + ? = 100
  38. 38.12 + ? = 100
  39. 39.64 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 9
  2. 56
  3. 17
  4. 6
  5. 4
  6. 72
  7. 33
  8. 7
  9. 1
  10. 8
  11. 31
  12. 2
  13. 49
  14. 53
  15. 27
  16. 64
  17. 68
  18. 29
  19. 12
  20. 82
  21. 3
  22. 83
  23. 23
  24. 73
  25. 66
  26. 75
  27. 5
  28. 78
  29. 55
  30. 11
  31. 67
  32. 38
  33. 89
  34. 74
  35. 57
  36. 18
  37. 30
  38. 88
  39. 36
  40. 16

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