← 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 405 · 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. 2.13 + ? = 100
  3. 3.47 + ? = 100
  4. 4.49 + ? = 100
  5. 5.4 + ? = 10
  6. 6.1 + ? = 10
  7. 7.8 + ? = 10
  8. 8.7 + ? = 10
  9. 9.32 + ? = 100
  10. 10.85 + ? = 100
  11. 11.69 + ? = 100
  12. 12.20 + ? = 100
  13. 13.41 + ? = 100
  14. 14.55 + ? = 100
  15. 15.42 + ? = 100
  16. 16.5 + ? = 10
  17. 17.80 + ? = 100
  18. 18.44 + ? = 100
  19. 19.36 + ? = 100
  20. 20.56 + ? = 100
  21. 21.60 + ? = 100
  22. 22.2 + ? = 10
  23. 23.70 + ? = 100
  24. 24.27 + ? = 100
  25. 25.59 + ? = 100
  26. 26.73 + ? = 100
  27. 27.16 + ? = 100
  28. 28.18 + ? = 100
  29. 29.11 + ? = 100
  30. 30.78 + ? = 100
  31. 31.63 + ? = 100
  32. 32.62 + ? = 100
  33. 33.38 + ? = 100
  34. 34.25 + ? = 100
  35. 35.14 + ? = 100
  36. 36.76 + ? = 100
  37. 37.3 + ? = 10
  38. 38.79 + ? = 100
  39. 39.19 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 4
  2. 87
  3. 53
  4. 51
  5. 6
  6. 9
  7. 2
  8. 3
  9. 68
  10. 15
  11. 31
  12. 80
  13. 59
  14. 45
  15. 58
  16. 5
  17. 20
  18. 56
  19. 64
  20. 44
  21. 40
  22. 8
  23. 30
  24. 73
  25. 41
  26. 27
  27. 84
  28. 82
  29. 89
  30. 22
  31. 37
  32. 38
  33. 62
  34. 75
  35. 86
  36. 24
  37. 7
  38. 21
  39. 81
  40. 18

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