← 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 999 · 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. 2.17 + ? = 100
  3. 3.64 + ? = 100
  4. 4.68 + ? = 100
  5. 5.35 + ? = 100
  6. 6.61 + ? = 100
  7. 7.48 + ? = 100
  8. 8.41 + ? = 100
  9. 9.6 + ? = 10
  10. 10.7 + ? = 10
  11. 11.55 + ? = 100
  12. 12.3 + ? = 10
  13. 13.9 + ? = 10
  14. 14.88 + ? = 100
  15. 15.80 + ? = 100
  16. 16.73 + ? = 100
  17. 17.69 + ? = 100
  18. 18.50 + ? = 100
  19. 19.2 + ? = 10
  20. 20.70 + ? = 100
  21. 21.4 + ? = 10
  22. 22.45 + ? = 100
  23. 23.31 + ? = 100
  24. 24.13 + ? = 100
  25. 25.1 + ? = 10
  26. 26.24 + ? = 100
  27. 27.65 + ? = 100
  28. 28.32 + ? = 100
  29. 29.89 + ? = 100
  30. 30.47 + ? = 100
  31. 31.21 + ? = 100
  32. 32.5 + ? = 10
  33. 33.84 + ? = 100
  34. 34.40 + ? = 100
  35. 35.38 + ? = 100
  36. 36.23 + ? = 100
  37. 37.79 + ? = 100
  38. 38.60 + ? = 100
  39. 39.81 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 2
  2. 83
  3. 36
  4. 32
  5. 65
  6. 39
  7. 52
  8. 59
  9. 4
  10. 3
  11. 45
  12. 7
  13. 1
  14. 12
  15. 20
  16. 27
  17. 31
  18. 50
  19. 8
  20. 30
  21. 6
  22. 55
  23. 69
  24. 87
  25. 9
  26. 76
  27. 35
  28. 68
  29. 11
  30. 53
  31. 79
  32. 5
  33. 16
  34. 60
  35. 62
  36. 77
  37. 21
  38. 40
  39. 19
  40. 74

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