← 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 363 · 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. 1.34 + ? = 100
  2. 2.6 + ? = 10
  3. 3.12 + ? = 100
  4. 4.1 + ? = 10
  5. 5.28 + ? = 100
  6. 6.3 + ? = 10
  7. 7.72 + ? = 100
  8. 8.15 + ? = 100
  9. 9.37 + ? = 100
  10. 10.86 + ? = 100
  11. 11.17 + ? = 100
  12. 12.50 + ? = 100
  13. 13.2 + ? = 10
  14. 14.41 + ? = 100
  15. 15.38 + ? = 100
  16. 16.85 + ? = 100
  17. 17.83 + ? = 100
  18. 18.8 + ? = 10
  19. 19.27 + ? = 100
  20. 20.46 + ? = 100
  21. 21.47 + ? = 100
  22. 22.32 + ? = 100
  23. 23.13 + ? = 100
  24. 24.56 + ? = 100
  25. 25.4 + ? = 10
  26. 26.5 + ? = 10
  27. 27.48 + ? = 100
  28. 28.7 + ? = 10
  29. 29.20 + ? = 100
  30. 30.49 + ? = 100
  31. 31.89 + ? = 100
  32. 32.81 + ? = 100
  33. 33.53 + ? = 100
  34. 34.33 + ? = 100
  35. 35.9 + ? = 10
  36. 36.31 + ? = 100
  37. 37.57 + ? = 100
  38. 38.52 + ? = 100
  39. 39.79 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 66
  2. 4
  3. 88
  4. 9
  5. 72
  6. 7
  7. 28
  8. 85
  9. 63
  10. 14
  11. 83
  12. 50
  13. 8
  14. 59
  15. 62
  16. 15
  17. 17
  18. 2
  19. 73
  20. 54
  21. 53
  22. 68
  23. 87
  24. 44
  25. 6
  26. 5
  27. 52
  28. 3
  29. 80
  30. 51
  31. 11
  32. 19
  33. 47
  34. 67
  35. 1
  36. 69
  37. 43
  38. 48
  39. 21
  40. 41

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