← 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 564 · 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. 1.5 + ? = 10
  2. 2.2 + ? = 10
  3. 3.23 + ? = 100
  4. 4.7 + ? = 10
  5. 5.44 + ? = 100
  6. 6.69 + ? = 100
  7. 7.3 + ? = 10
  8. 8.4 + ? = 10
  9. 9.11 + ? = 100
  10. 10.33 + ? = 100
  11. 11.59 + ? = 100
  12. 12.19 + ? = 100
  13. 13.60 + ? = 100
  14. 14.9 + ? = 10
  15. 15.71 + ? = 100
  16. 16.50 + ? = 100
  17. 17.31 + ? = 100
  18. 18.28 + ? = 100
  19. 19.32 + ? = 100
  20. 20.22 + ? = 100
  21. 21.86 + ? = 100
  22. 22.79 + ? = 100
  23. 23.58 + ? = 100
  24. 24.14 + ? = 100
  25. 25.25 + ? = 100
  26. 26.17 + ? = 100
  27. 27.18 + ? = 100
  28. 28.6 + ? = 10
  29. 29.12 + ? = 100
  30. 30.74 + ? = 100
  31. 31.8 + ? = 10
  32. 32.24 + ? = 100
  33. 33.87 + ? = 100
  34. 34.37 + ? = 100
  35. 35.1 + ? = 10
  36. 36.63 + ? = 100
  37. 37.66 + ? = 100
  38. 38.38 + ? = 100
  39. 39.82 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 5
  2. 8
  3. 77
  4. 3
  5. 56
  6. 31
  7. 7
  8. 6
  9. 89
  10. 67
  11. 41
  12. 81
  13. 40
  14. 1
  15. 29
  16. 50
  17. 69
  18. 72
  19. 68
  20. 78
  21. 14
  22. 21
  23. 42
  24. 86
  25. 75
  26. 83
  27. 82
  28. 4
  29. 88
  30. 26
  31. 2
  32. 76
  33. 13
  34. 63
  35. 9
  36. 37
  37. 34
  38. 62
  39. 18
  40. 73

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