← 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 678 · 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. 1.86 + ? = 100
  2. 2.74 + ? = 100
  3. 3.33 + ? = 100
  4. 4.52 + ? = 100
  5. 5.26 + ? = 100
  6. 6.21 + ? = 100
  7. 7.8 + ? = 10
  8. 8.58 + ? = 100
  9. 9.54 + ? = 100
  10. 10.25 + ? = 100
  11. 11.3 + ? = 10
  12. 12.40 + ? = 100
  13. 13.7 + ? = 10
  14. 14.4 + ? = 10
  15. 15.5 + ? = 10
  16. 16.6 + ? = 10
  17. 17.53 + ? = 100
  18. 18.85 + ? = 100
  19. 19.12 + ? = 100
  20. 20.2 + ? = 10
  21. 21.67 + ? = 100
  22. 22.9 + ? = 10
  23. 23.17 + ? = 100
  24. 24.71 + ? = 100
  25. 25.38 + ? = 100
  26. 26.18 + ? = 100
  27. 27.14 + ? = 100
  28. 28.47 + ? = 100
  29. 29.62 + ? = 100
  30. 30.27 + ? = 100
  31. 31.28 + ? = 100
  32. 32.42 + ? = 100
  33. 33.59 + ? = 100
  34. 34.29 + ? = 100
  35. 35.1 + ? = 10
  36. 36.56 + ? = 100
  37. 37.69 + ? = 100
  38. 38.43 + ? = 100
  39. 39.72 + ? = 100
  40. 40.15 + ? = 100

Answer key

  1. 14
  2. 26
  3. 67
  4. 48
  5. 74
  6. 79
  7. 2
  8. 42
  9. 46
  10. 75
  11. 7
  12. 60
  13. 3
  14. 6
  15. 5
  16. 4
  17. 47
  18. 15
  19. 88
  20. 8
  21. 33
  22. 1
  23. 83
  24. 29
  25. 62
  26. 82
  27. 86
  28. 53
  29. 38
  30. 73
  31. 72
  32. 58
  33. 41
  34. 71
  35. 9
  36. 44
  37. 31
  38. 57
  39. 28
  40. 85

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