← 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 440 · 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. 1.17 + ? = 100
  2. 2.16 + ? = 100
  3. 3.33 + ? = 100
  4. 4.2 + ? = 10
  5. 5.20 + ? = 100
  6. 6.53 + ? = 100
  7. 7.76 + ? = 100
  8. 8.4 + ? = 10
  9. 9.3 + ? = 10
  10. 10.1 + ? = 10
  11. 11.66 + ? = 100
  12. 12.61 + ? = 100
  13. 13.18 + ? = 100
  14. 14.71 + ? = 100
  15. 15.8 + ? = 10
  16. 16.15 + ? = 100
  17. 17.23 + ? = 100
  18. 18.5 + ? = 10
  19. 19.6 + ? = 10
  20. 20.7 + ? = 10
  21. 21.72 + ? = 100
  22. 22.88 + ? = 100
  23. 23.73 + ? = 100
  24. 24.14 + ? = 100
  25. 25.9 + ? = 10
  26. 26.37 + ? = 100
  27. 27.81 + ? = 100
  28. 28.32 + ? = 100
  29. 29.75 + ? = 100
  30. 30.54 + ? = 100
  31. 31.49 + ? = 100
  32. 32.52 + ? = 100
  33. 33.30 + ? = 100
  34. 34.84 + ? = 100
  35. 35.59 + ? = 100
  36. 36.35 + ? = 100
  37. 37.41 + ? = 100
  38. 38.22 + ? = 100
  39. 39.78 + ? = 100
  40. 40.62 + ? = 100

Answer key

  1. 83
  2. 84
  3. 67
  4. 8
  5. 80
  6. 47
  7. 24
  8. 6
  9. 7
  10. 9
  11. 34
  12. 39
  13. 82
  14. 29
  15. 2
  16. 85
  17. 77
  18. 5
  19. 4
  20. 3
  21. 28
  22. 12
  23. 27
  24. 86
  25. 1
  26. 63
  27. 19
  28. 68
  29. 25
  30. 46
  31. 51
  32. 48
  33. 70
  34. 16
  35. 41
  36. 65
  37. 59
  38. 78
  39. 22
  40. 38

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