← 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 426 · 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. 1.6 + ? = 10
  2. 2.1 + ? = 10
  3. 3.3 + ? = 10
  4. 4.20 + ? = 100
  5. 5.82 + ? = 100
  6. 6.65 + ? = 100
  7. 7.13 + ? = 100
  8. 8.27 + ? = 100
  9. 9.50 + ? = 100
  10. 10.85 + ? = 100
  11. 11.59 + ? = 100
  12. 12.8 + ? = 10
  13. 13.4 + ? = 10
  14. 14.2 + ? = 10
  15. 15.28 + ? = 100
  16. 16.9 + ? = 10
  17. 17.35 + ? = 100
  18. 18.11 + ? = 100
  19. 19.32 + ? = 100
  20. 20.18 + ? = 100
  21. 21.42 + ? = 100
  22. 22.76 + ? = 100
  23. 23.48 + ? = 100
  24. 24.77 + ? = 100
  25. 25.83 + ? = 100
  26. 26.71 + ? = 100
  27. 27.5 + ? = 10
  28. 28.43 + ? = 100
  29. 29.7 + ? = 10
  30. 30.44 + ? = 100
  31. 31.89 + ? = 100
  32. 32.14 + ? = 100
  33. 33.38 + ? = 100
  34. 34.57 + ? = 100
  35. 35.51 + ? = 100
  36. 36.78 + ? = 100
  37. 37.30 + ? = 100
  38. 38.29 + ? = 100
  39. 39.21 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 4
  2. 9
  3. 7
  4. 80
  5. 18
  6. 35
  7. 87
  8. 73
  9. 50
  10. 15
  11. 41
  12. 2
  13. 6
  14. 8
  15. 72
  16. 1
  17. 65
  18. 89
  19. 68
  20. 82
  21. 58
  22. 24
  23. 52
  24. 23
  25. 17
  26. 29
  27. 5
  28. 57
  29. 3
  30. 56
  31. 11
  32. 86
  33. 62
  34. 43
  35. 49
  36. 22
  37. 70
  38. 71
  39. 79
  40. 55

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