← 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 517 · 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. 1.81 + ? = 100
  2. 2.8 + ? = 10
  3. 3.12 + ? = 100
  4. 4.59 + ? = 100
  5. 5.1 + ? = 10
  6. 6.42 + ? = 100
  7. 7.27 + ? = 100
  8. 8.4 + ? = 10
  9. 9.71 + ? = 100
  10. 10.2 + ? = 10
  11. 11.5 + ? = 10
  12. 12.6 + ? = 10
  13. 13.52 + ? = 100
  14. 14.9 + ? = 10
  15. 15.83 + ? = 100
  16. 16.21 + ? = 100
  17. 17.30 + ? = 100
  18. 18.7 + ? = 10
  19. 19.23 + ? = 100
  20. 20.54 + ? = 100
  21. 21.3 + ? = 10
  22. 22.55 + ? = 100
  23. 23.63 + ? = 100
  24. 24.86 + ? = 100
  25. 25.72 + ? = 100
  26. 26.24 + ? = 100
  27. 27.32 + ? = 100
  28. 28.85 + ? = 100
  29. 29.57 + ? = 100
  30. 30.15 + ? = 100
  31. 31.29 + ? = 100
  32. 32.84 + ? = 100
  33. 33.53 + ? = 100
  34. 34.75 + ? = 100
  35. 35.11 + ? = 100
  36. 36.43 + ? = 100
  37. 37.69 + ? = 100
  38. 38.16 + ? = 100
  39. 39.44 + ? = 100
  40. 40.64 + ? = 100

Answer key

  1. 19
  2. 2
  3. 88
  4. 41
  5. 9
  6. 58
  7. 73
  8. 6
  9. 29
  10. 8
  11. 5
  12. 4
  13. 48
  14. 1
  15. 17
  16. 79
  17. 70
  18. 3
  19. 77
  20. 46
  21. 7
  22. 45
  23. 37
  24. 14
  25. 28
  26. 76
  27. 68
  28. 15
  29. 43
  30. 85
  31. 71
  32. 16
  33. 47
  34. 25
  35. 89
  36. 57
  37. 31
  38. 84
  39. 56
  40. 36

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