← 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 316 · 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. 1.72 + ? = 100
  2. 2.7 + ? = 10
  3. 3.61 + ? = 100
  4. 4.6 + ? = 10
  5. 5.2 + ? = 10
  6. 6.25 + ? = 100
  7. 7.16 + ? = 100
  8. 8.8 + ? = 10
  9. 9.47 + ? = 100
  10. 10.3 + ? = 10
  11. 11.62 + ? = 100
  12. 12.66 + ? = 100
  13. 13.28 + ? = 100
  14. 14.87 + ? = 100
  15. 15.20 + ? = 100
  16. 16.75 + ? = 100
  17. 17.11 + ? = 100
  18. 18.15 + ? = 100
  19. 19.26 + ? = 100
  20. 20.32 + ? = 100
  21. 21.74 + ? = 100
  22. 22.46 + ? = 100
  23. 23.22 + ? = 100
  24. 24.45 + ? = 100
  25. 25.34 + ? = 100
  26. 26.19 + ? = 100
  27. 27.48 + ? = 100
  28. 28.88 + ? = 100
  29. 29.5 + ? = 10
  30. 30.58 + ? = 100
  31. 31.9 + ? = 10
  32. 32.73 + ? = 100
  33. 33.14 + ? = 100
  34. 34.12 + ? = 100
  35. 35.36 + ? = 100
  36. 36.1 + ? = 10
  37. 37.18 + ? = 100
  38. 38.81 + ? = 100
  39. 39.59 + ? = 100
  40. 40.79 + ? = 100

Answer key

  1. 28
  2. 3
  3. 39
  4. 4
  5. 8
  6. 75
  7. 84
  8. 2
  9. 53
  10. 7
  11. 38
  12. 34
  13. 72
  14. 13
  15. 80
  16. 25
  17. 89
  18. 85
  19. 74
  20. 68
  21. 26
  22. 54
  23. 78
  24. 55
  25. 66
  26. 81
  27. 52
  28. 12
  29. 5
  30. 42
  31. 1
  32. 27
  33. 86
  34. 88
  35. 64
  36. 9
  37. 82
  38. 19
  39. 41
  40. 21

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