← 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 725 · 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. 1.26 + ? = 100
  2. 2.61 + ? = 100
  3. 3.28 + ? = 100
  4. 4.48 + ? = 100
  5. 5.5 + ? = 10
  6. 6.18 + ? = 100
  7. 7.6 + ? = 10
  8. 8.1 + ? = 10
  9. 9.45 + ? = 100
  10. 10.3 + ? = 10
  11. 11.4 + ? = 10
  12. 12.66 + ? = 100
  13. 13.79 + ? = 100
  14. 14.74 + ? = 100
  15. 15.84 + ? = 100
  16. 16.9 + ? = 10
  17. 17.7 + ? = 10
  18. 18.2 + ? = 10
  19. 19.81 + ? = 100
  20. 20.43 + ? = 100
  21. 21.52 + ? = 100
  22. 22.23 + ? = 100
  23. 23.22 + ? = 100
  24. 24.35 + ? = 100
  25. 25.29 + ? = 100
  26. 26.41 + ? = 100
  27. 27.25 + ? = 100
  28. 28.87 + ? = 100
  29. 29.31 + ? = 100
  30. 30.51 + ? = 100
  31. 31.78 + ? = 100
  32. 32.57 + ? = 100
  33. 33.33 + ? = 100
  34. 34.20 + ? = 100
  35. 35.37 + ? = 100
  36. 36.8 + ? = 10
  37. 37.36 + ? = 100
  38. 38.68 + ? = 100
  39. 39.42 + ? = 100
  40. 40.75 + ? = 100

Answer key

  1. 74
  2. 39
  3. 72
  4. 52
  5. 5
  6. 82
  7. 4
  8. 9
  9. 55
  10. 7
  11. 6
  12. 34
  13. 21
  14. 26
  15. 16
  16. 1
  17. 3
  18. 8
  19. 19
  20. 57
  21. 48
  22. 77
  23. 78
  24. 65
  25. 71
  26. 59
  27. 75
  28. 13
  29. 69
  30. 49
  31. 22
  32. 43
  33. 67
  34. 80
  35. 63
  36. 2
  37. 64
  38. 32
  39. 58
  40. 25

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