← 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 40 · 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. 1.66 + ? = 100
  2. 2.53 + ? = 100
  3. 3.8 + ? = 10
  4. 4.31 + ? = 100
  5. 5.24 + ? = 100
  6. 6.60 + ? = 100
  7. 7.5 + ? = 10
  8. 8.84 + ? = 100
  9. 9.32 + ? = 100
  10. 10.9 + ? = 10
  11. 11.75 + ? = 100
  12. 12.81 + ? = 100
  13. 13.1 + ? = 10
  14. 14.4 + ? = 10
  15. 15.76 + ? = 100
  16. 16.40 + ? = 100
  17. 17.29 + ? = 100
  18. 18.57 + ? = 100
  19. 19.6 + ? = 10
  20. 20.7 + ? = 10
  21. 21.3 + ? = 10
  22. 22.2 + ? = 10
  23. 23.89 + ? = 100
  24. 24.20 + ? = 100
  25. 25.37 + ? = 100
  26. 26.15 + ? = 100
  27. 27.61 + ? = 100
  28. 28.65 + ? = 100
  29. 29.47 + ? = 100
  30. 30.49 + ? = 100
  31. 31.33 + ? = 100
  32. 32.45 + ? = 100
  33. 33.59 + ? = 100
  34. 34.86 + ? = 100
  35. 35.64 + ? = 100
  36. 36.25 + ? = 100
  37. 37.22 + ? = 100
  38. 38.63 + ? = 100
  39. 39.82 + ? = 100
  40. 40.51 + ? = 100

Answer key

  1. 34
  2. 47
  3. 2
  4. 69
  5. 76
  6. 40
  7. 5
  8. 16
  9. 68
  10. 1
  11. 25
  12. 19
  13. 9
  14. 6
  15. 24
  16. 60
  17. 71
  18. 43
  19. 4
  20. 3
  21. 7
  22. 8
  23. 11
  24. 80
  25. 63
  26. 85
  27. 39
  28. 35
  29. 53
  30. 51
  31. 67
  32. 55
  33. 41
  34. 14
  35. 36
  36. 75
  37. 78
  38. 37
  39. 18
  40. 49

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