← 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 85 · 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. 1.12 + ? = 100
  2. 2.48 + ? = 100
  3. 3.6 + ? = 10
  4. 4.7 + ? = 10
  5. 5.27 + ? = 100
  6. 6.23 + ? = 100
  7. 7.9 + ? = 10
  8. 8.30 + ? = 100
  9. 9.1 + ? = 10
  10. 10.61 + ? = 100
  11. 11.17 + ? = 100
  12. 12.38 + ? = 100
  13. 13.40 + ? = 100
  14. 14.47 + ? = 100
  15. 15.60 + ? = 100
  16. 16.3 + ? = 10
  17. 17.2 + ? = 10
  18. 18.64 + ? = 100
  19. 19.20 + ? = 100
  20. 20.15 + ? = 100
  21. 21.87 + ? = 100
  22. 22.45 + ? = 100
  23. 23.19 + ? = 100
  24. 24.75 + ? = 100
  25. 25.8 + ? = 10
  26. 26.41 + ? = 100
  27. 27.67 + ? = 100
  28. 28.5 + ? = 10
  29. 29.71 + ? = 100
  30. 30.43 + ? = 100
  31. 31.31 + ? = 100
  32. 32.11 + ? = 100
  33. 33.14 + ? = 100
  34. 34.4 + ? = 10
  35. 35.70 + ? = 100
  36. 36.21 + ? = 100
  37. 37.68 + ? = 100
  38. 38.63 + ? = 100
  39. 39.79 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 88
  2. 52
  3. 4
  4. 3
  5. 73
  6. 77
  7. 1
  8. 70
  9. 9
  10. 39
  11. 83
  12. 62
  13. 60
  14. 53
  15. 40
  16. 7
  17. 8
  18. 36
  19. 80
  20. 85
  21. 13
  22. 55
  23. 81
  24. 25
  25. 2
  26. 59
  27. 33
  28. 5
  29. 29
  30. 57
  31. 69
  32. 89
  33. 86
  34. 6
  35. 30
  36. 79
  37. 32
  38. 37
  39. 21
  40. 74

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