← 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 280 · 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. 1.1 + ? = 10
  2. 2.4 + ? = 10
  3. 3.89 + ? = 100
  4. 4.32 + ? = 100
  5. 5.8 + ? = 10
  6. 6.47 + ? = 100
  7. 7.56 + ? = 100
  8. 8.52 + ? = 100
  9. 9.36 + ? = 100
  10. 10.5 + ? = 10
  11. 11.50 + ? = 100
  12. 12.18 + ? = 100
  13. 13.75 + ? = 100
  14. 14.6 + ? = 10
  15. 15.7 + ? = 10
  16. 16.64 + ? = 100
  17. 17.20 + ? = 100
  18. 18.34 + ? = 100
  19. 19.3 + ? = 10
  20. 20.53 + ? = 100
  21. 21.74 + ? = 100
  22. 22.2 + ? = 10
  23. 23.58 + ? = 100
  24. 24.45 + ? = 100
  25. 25.9 + ? = 10
  26. 26.11 + ? = 100
  27. 27.39 + ? = 100
  28. 28.2 + ? = 10
  29. 29.65 + ? = 100
  30. 30.88 + ? = 100
  31. 31.73 + ? = 100
  32. 32.26 + ? = 100
  33. 33.62 + ? = 100
  34. 34.25 + ? = 100
  35. 35.86 + ? = 100
  36. 36.60 + ? = 100
  37. 37.71 + ? = 100
  38. 38.69 + ? = 100
  39. 39.19 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 9
  2. 6
  3. 11
  4. 68
  5. 2
  6. 53
  7. 44
  8. 48
  9. 64
  10. 5
  11. 50
  12. 82
  13. 25
  14. 4
  15. 3
  16. 36
  17. 80
  18. 66
  19. 7
  20. 47
  21. 26
  22. 8
  23. 42
  24. 55
  25. 1
  26. 89
  27. 61
  28. 8
  29. 35
  30. 12
  31. 27
  32. 74
  33. 38
  34. 75
  35. 14
  36. 40
  37. 29
  38. 31
  39. 81
  40. 87

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