← 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 296 · 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. 1.7 + ? = 10
  2. 2.1 + ? = 10
  3. 3.4 + ? = 10
  4. 4.26 + ? = 100
  5. 5.6 + ? = 10
  6. 6.79 + ? = 100
  7. 7.85 + ? = 100
  8. 8.2 + ? = 10
  9. 9.15 + ? = 100
  10. 10.73 + ? = 100
  11. 11.20 + ? = 100
  12. 12.69 + ? = 100
  13. 13.54 + ? = 100
  14. 14.9 + ? = 10
  15. 15.87 + ? = 100
  16. 16.8 + ? = 10
  17. 17.83 + ? = 100
  18. 18.66 + ? = 100
  19. 19.42 + ? = 100
  20. 20.41 + ? = 100
  21. 21.86 + ? = 100
  22. 22.53 + ? = 100
  23. 23.3 + ? = 10
  24. 24.32 + ? = 100
  25. 25.24 + ? = 100
  26. 26.49 + ? = 100
  27. 27.21 + ? = 100
  28. 28.5 + ? = 10
  29. 29.45 + ? = 100
  30. 30.75 + ? = 100
  31. 31.84 + ? = 100
  32. 32.89 + ? = 100
  33. 33.16 + ? = 100
  34. 34.31 + ? = 100
  35. 35.56 + ? = 100
  36. 36.17 + ? = 100
  37. 37.14 + ? = 100
  38. 38.67 + ? = 100
  39. 39.33 + ? = 100
  40. 40.61 + ? = 100

Answer key

  1. 3
  2. 9
  3. 6
  4. 74
  5. 4
  6. 21
  7. 15
  8. 8
  9. 85
  10. 27
  11. 80
  12. 31
  13. 46
  14. 1
  15. 13
  16. 2
  17. 17
  18. 34
  19. 58
  20. 59
  21. 14
  22. 47
  23. 7
  24. 68
  25. 76
  26. 51
  27. 79
  28. 5
  29. 55
  30. 25
  31. 16
  32. 11
  33. 84
  34. 69
  35. 44
  36. 83
  37. 86
  38. 33
  39. 67
  40. 39

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