← 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 404 · 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. 1.21 + ? = 100
  2. 2.7 + ? = 10
  3. 3.1 + ? = 10
  4. 4.9 + ? = 10
  5. 5.86 + ? = 100
  6. 6.62 + ? = 100
  7. 7.64 + ? = 100
  8. 8.8 + ? = 10
  9. 9.5 + ? = 10
  10. 10.2 + ? = 10
  11. 11.14 + ? = 100
  12. 12.85 + ? = 100
  13. 13.73 + ? = 100
  14. 14.46 + ? = 100
  15. 15.31 + ? = 100
  16. 16.59 + ? = 100
  17. 17.11 + ? = 100
  18. 18.87 + ? = 100
  19. 19.53 + ? = 100
  20. 20.75 + ? = 100
  21. 21.58 + ? = 100
  22. 22.3 + ? = 10
  23. 23.6 + ? = 10
  24. 24.69 + ? = 100
  25. 25.27 + ? = 100
  26. 26.4 + ? = 10
  27. 27.83 + ? = 100
  28. 28.66 + ? = 100
  29. 29.28 + ? = 100
  30. 30.26 + ? = 100
  31. 31.22 + ? = 100
  32. 32.18 + ? = 100
  33. 33.39 + ? = 100
  34. 34.56 + ? = 100
  35. 35.74 + ? = 100
  36. 36.37 + ? = 100
  37. 37.33 + ? = 100
  38. 38.88 + ? = 100
  39. 39.55 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 79
  2. 3
  3. 9
  4. 1
  5. 14
  6. 38
  7. 36
  8. 2
  9. 5
  10. 8
  11. 86
  12. 15
  13. 27
  14. 54
  15. 69
  16. 41
  17. 89
  18. 13
  19. 47
  20. 25
  21. 42
  22. 7
  23. 4
  24. 31
  25. 73
  26. 6
  27. 17
  28. 34
  29. 72
  30. 74
  31. 78
  32. 82
  33. 61
  34. 44
  35. 26
  36. 63
  37. 67
  38. 12
  39. 45
  40. 23

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