← 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 299 · 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. 1.35 + ? = 100
  2. 2.59 + ? = 100
  3. 3.63 + ? = 100
  4. 4.87 + ? = 100
  5. 5.5 + ? = 10
  6. 6.33 + ? = 100
  7. 7.1 + ? = 10
  8. 8.72 + ? = 100
  9. 9.9 + ? = 10
  10. 10.56 + ? = 100
  11. 11.11 + ? = 100
  12. 12.40 + ? = 100
  13. 13.17 + ? = 100
  14. 14.8 + ? = 10
  15. 15.77 + ? = 100
  16. 16.14 + ? = 100
  17. 17.3 + ? = 10
  18. 18.6 + ? = 10
  19. 19.2 + ? = 10
  20. 20.30 + ? = 100
  21. 21.54 + ? = 100
  22. 22.62 + ? = 100
  23. 23.52 + ? = 100
  24. 24.26 + ? = 100
  25. 25.65 + ? = 100
  26. 26.53 + ? = 100
  27. 27.43 + ? = 100
  28. 28.41 + ? = 100
  29. 29.48 + ? = 100
  30. 30.88 + ? = 100
  31. 31.74 + ? = 100
  32. 32.29 + ? = 100
  33. 33.4 + ? = 10
  34. 34.32 + ? = 100
  35. 35.68 + ? = 100
  36. 36.7 + ? = 10
  37. 37.47 + ? = 100
  38. 38.89 + ? = 100
  39. 39.42 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 65
  2. 41
  3. 37
  4. 13
  5. 5
  6. 67
  7. 9
  8. 28
  9. 1
  10. 44
  11. 89
  12. 60
  13. 83
  14. 2
  15. 23
  16. 86
  17. 7
  18. 4
  19. 8
  20. 70
  21. 46
  22. 38
  23. 48
  24. 74
  25. 35
  26. 47
  27. 57
  28. 59
  29. 52
  30. 12
  31. 26
  32. 71
  33. 6
  34. 68
  35. 32
  36. 3
  37. 53
  38. 11
  39. 58
  40. 55

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