← 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 133 · 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. 1.24 + ? = 100
  2. 2.7 + ? = 10
  3. 3.18 + ? = 100
  4. 4.1 + ? = 10
  5. 5.3 + ? = 10
  6. 6.65 + ? = 100
  7. 7.15 + ? = 100
  8. 8.26 + ? = 100
  9. 9.41 + ? = 100
  10. 10.2 + ? = 10
  11. 11.44 + ? = 100
  12. 12.76 + ? = 100
  13. 13.4 + ? = 10
  14. 14.85 + ? = 100
  15. 15.57 + ? = 100
  16. 16.29 + ? = 100
  17. 17.43 + ? = 100
  18. 18.28 + ? = 100
  19. 19.14 + ? = 100
  20. 20.32 + ? = 100
  21. 21.39 + ? = 100
  22. 22.5 + ? = 10
  23. 23.8 + ? = 10
  24. 24.19 + ? = 100
  25. 25.82 + ? = 100
  26. 26.78 + ? = 100
  27. 27.72 + ? = 100
  28. 28.23 + ? = 100
  29. 29.71 + ? = 100
  30. 30.16 + ? = 100
  31. 31.88 + ? = 100
  32. 32.86 + ? = 100
  33. 33.47 + ? = 100
  34. 34.79 + ? = 100
  35. 35.42 + ? = 100
  36. 36.34 + ? = 100
  37. 37.11 + ? = 100
  38. 38.9 + ? = 10
  39. 39.46 + ? = 100
  40. 40.6 + ? = 10

Answer key

  1. 76
  2. 3
  3. 82
  4. 9
  5. 7
  6. 35
  7. 85
  8. 74
  9. 59
  10. 8
  11. 56
  12. 24
  13. 6
  14. 15
  15. 43
  16. 71
  17. 57
  18. 72
  19. 86
  20. 68
  21. 61
  22. 5
  23. 2
  24. 81
  25. 18
  26. 22
  27. 28
  28. 77
  29. 29
  30. 84
  31. 12
  32. 14
  33. 53
  34. 21
  35. 58
  36. 66
  37. 89
  38. 1
  39. 54
  40. 4

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