← 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 391 · 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. 1.8 + ? = 10
  2. 2.9 + ? = 10
  3. 3.34 + ? = 100
  4. 4.66 + ? = 100
  5. 5.5 + ? = 10
  6. 6.83 + ? = 100
  7. 7.28 + ? = 100
  8. 8.26 + ? = 100
  9. 9.6 + ? = 10
  10. 10.7 + ? = 10
  11. 11.63 + ? = 100
  12. 12.1 + ? = 10
  13. 13.2 + ? = 10
  14. 14.70 + ? = 100
  15. 15.76 + ? = 100
  16. 16.3 + ? = 10
  17. 17.54 + ? = 100
  18. 18.56 + ? = 100
  19. 19.31 + ? = 100
  20. 20.27 + ? = 100
  21. 21.85 + ? = 100
  22. 22.35 + ? = 100
  23. 23.77 + ? = 100
  24. 24.40 + ? = 100
  25. 25.47 + ? = 100
  26. 26.16 + ? = 100
  27. 27.53 + ? = 100
  28. 28.87 + ? = 100
  29. 29.38 + ? = 100
  30. 30.3 + ? = 10
  31. 31.64 + ? = 100
  32. 32.4 + ? = 10
  33. 33.72 + ? = 100
  34. 34.17 + ? = 100
  35. 35.51 + ? = 100
  36. 36.43 + ? = 100
  37. 37.18 + ? = 100
  38. 38.12 + ? = 100
  39. 39.39 + ? = 100
  40. 40.55 + ? = 100

Answer key

  1. 2
  2. 1
  3. 66
  4. 34
  5. 5
  6. 17
  7. 72
  8. 74
  9. 4
  10. 3
  11. 37
  12. 9
  13. 8
  14. 30
  15. 24
  16. 7
  17. 46
  18. 44
  19. 69
  20. 73
  21. 15
  22. 65
  23. 23
  24. 60
  25. 53
  26. 84
  27. 47
  28. 13
  29. 62
  30. 7
  31. 36
  32. 6
  33. 28
  34. 83
  35. 49
  36. 57
  37. 82
  38. 88
  39. 61
  40. 45

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