← 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 900 · 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. 1.8 + ? = 10
  2. 2.14 + ? = 100
  3. 3.44 + ? = 100
  4. 4.86 + ? = 100
  5. 5.81 + ? = 100
  6. 6.7 + ? = 10
  7. 7.74 + ? = 100
  8. 8.23 + ? = 100
  9. 9.1 + ? = 10
  10. 10.87 + ? = 100
  11. 11.32 + ? = 100
  12. 12.9 + ? = 10
  13. 13.27 + ? = 100
  14. 14.28 + ? = 100
  15. 15.4 + ? = 10
  16. 16.40 + ? = 100
  17. 17.76 + ? = 100
  18. 18.56 + ? = 100
  19. 19.77 + ? = 100
  20. 20.67 + ? = 100
  21. 21.31 + ? = 100
  22. 22.89 + ? = 100
  23. 23.12 + ? = 100
  24. 24.19 + ? = 100
  25. 25.18 + ? = 100
  26. 26.15 + ? = 100
  27. 27.41 + ? = 100
  28. 28.25 + ? = 100
  29. 29.6 + ? = 10
  30. 30.2 + ? = 10
  31. 31.85 + ? = 100
  32. 32.24 + ? = 100
  33. 33.48 + ? = 100
  34. 34.5 + ? = 10
  35. 35.84 + ? = 100
  36. 36.3 + ? = 10
  37. 37.65 + ? = 100
  38. 38.13 + ? = 100
  39. 39.71 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 2
  2. 86
  3. 56
  4. 14
  5. 19
  6. 3
  7. 26
  8. 77
  9. 9
  10. 13
  11. 68
  12. 1
  13. 73
  14. 72
  15. 6
  16. 60
  17. 24
  18. 44
  19. 23
  20. 33
  21. 69
  22. 11
  23. 88
  24. 81
  25. 82
  26. 85
  27. 59
  28. 75
  29. 4
  30. 8
  31. 15
  32. 76
  33. 52
  34. 5
  35. 16
  36. 7
  37. 35
  38. 87
  39. 29
  40. 40

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