← 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 380 · 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. 1.70 + ? = 100
  2. 2.56 + ? = 100
  3. 3.12 + ? = 100
  4. 4.1 + ? = 10
  5. 5.5 + ? = 10
  6. 6.4 + ? = 10
  7. 7.6 + ? = 10
  8. 8.7 + ? = 10
  9. 9.14 + ? = 100
  10. 10.59 + ? = 100
  11. 11.50 + ? = 100
  12. 12.24 + ? = 100
  13. 13.8 + ? = 10
  14. 14.85 + ? = 100
  15. 15.3 + ? = 10
  16. 16.79 + ? = 100
  17. 17.31 + ? = 100
  18. 18.69 + ? = 100
  19. 19.9 + ? = 10
  20. 20.33 + ? = 100
  21. 21.62 + ? = 100
  22. 22.2 + ? = 10
  23. 23.54 + ? = 100
  24. 24.71 + ? = 100
  25. 25.42 + ? = 100
  26. 26.84 + ? = 100
  27. 27.51 + ? = 100
  28. 28.65 + ? = 100
  29. 29.76 + ? = 100
  30. 30.34 + ? = 100
  31. 31.89 + ? = 100
  32. 32.81 + ? = 100
  33. 33.83 + ? = 100
  34. 34.57 + ? = 100
  35. 35.13 + ? = 100
  36. 36.47 + ? = 100
  37. 37.78 + ? = 100
  38. 38.64 + ? = 100
  39. 39.72 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 30
  2. 44
  3. 88
  4. 9
  5. 5
  6. 6
  7. 4
  8. 3
  9. 86
  10. 41
  11. 50
  12. 76
  13. 2
  14. 15
  15. 7
  16. 21
  17. 69
  18. 31
  19. 1
  20. 67
  21. 38
  22. 8
  23. 46
  24. 29
  25. 58
  26. 16
  27. 49
  28. 35
  29. 24
  30. 66
  31. 11
  32. 19
  33. 17
  34. 43
  35. 87
  36. 53
  37. 22
  38. 36
  39. 28
  40. 74

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