← 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 354 · 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. 1.17 + ? = 100
  2. 2.2 + ? = 10
  3. 3.9 + ? = 10
  4. 4.25 + ? = 100
  5. 5.76 + ? = 100
  6. 6.41 + ? = 100
  7. 7.3 + ? = 10
  8. 8.1 + ? = 10
  9. 9.30 + ? = 100
  10. 10.13 + ? = 100
  11. 11.4 + ? = 10
  12. 12.6 + ? = 10
  13. 13.5 + ? = 10
  14. 14.18 + ? = 100
  15. 15.8 + ? = 10
  16. 16.57 + ? = 100
  17. 17.84 + ? = 100
  18. 18.44 + ? = 100
  19. 19.85 + ? = 100
  20. 20.42 + ? = 100
  21. 21.89 + ? = 100
  22. 22.28 + ? = 100
  23. 23.79 + ? = 100
  24. 24.34 + ? = 100
  25. 25.55 + ? = 100
  26. 26.29 + ? = 100
  27. 27.7 + ? = 10
  28. 28.16 + ? = 100
  29. 29.39 + ? = 100
  30. 30.12 + ? = 100
  31. 31.33 + ? = 100
  32. 32.32 + ? = 100
  33. 33.47 + ? = 100
  34. 34.35 + ? = 100
  35. 35.65 + ? = 100
  36. 36.59 + ? = 100
  37. 37.58 + ? = 100
  38. 38.80 + ? = 100
  39. 39.77 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 83
  2. 8
  3. 1
  4. 75
  5. 24
  6. 59
  7. 7
  8. 9
  9. 70
  10. 87
  11. 6
  12. 4
  13. 5
  14. 82
  15. 2
  16. 43
  17. 16
  18. 56
  19. 15
  20. 58
  21. 11
  22. 72
  23. 21
  24. 66
  25. 45
  26. 71
  27. 3
  28. 84
  29. 61
  30. 88
  31. 67
  32. 68
  33. 53
  34. 65
  35. 35
  36. 41
  37. 42
  38. 20
  39. 23
  40. 80

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