← 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 454 · 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. 1.6 + ? = 10
  2. 2.70 + ? = 100
  3. 3.75 + ? = 100
  4. 4.9 + ? = 10
  5. 5.8 + ? = 10
  6. 6.4 + ? = 10
  7. 7.34 + ? = 100
  8. 8.59 + ? = 100
  9. 9.2 + ? = 10
  10. 10.83 + ? = 100
  11. 11.53 + ? = 100
  12. 12.85 + ? = 100
  13. 13.3 + ? = 10
  14. 14.22 + ? = 100
  15. 15.18 + ? = 100
  16. 16.1 + ? = 10
  17. 17.5 + ? = 10
  18. 18.54 + ? = 100
  19. 19.7 + ? = 10
  20. 20.14 + ? = 100
  21. 21.65 + ? = 100
  22. 22.29 + ? = 100
  23. 23.31 + ? = 100
  24. 24.50 + ? = 100
  25. 25.51 + ? = 100
  26. 26.15 + ? = 100
  27. 27.41 + ? = 100
  28. 28.52 + ? = 100
  29. 29.16 + ? = 100
  30. 30.13 + ? = 100
  31. 31.79 + ? = 100
  32. 32.73 + ? = 100
  33. 33.11 + ? = 100
  34. 34.33 + ? = 100
  35. 35.44 + ? = 100
  36. 36.76 + ? = 100
  37. 37.56 + ? = 100
  38. 38.12 + ? = 100
  39. 39.68 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 4
  2. 30
  3. 25
  4. 1
  5. 2
  6. 6
  7. 66
  8. 41
  9. 8
  10. 17
  11. 47
  12. 15
  13. 7
  14. 78
  15. 82
  16. 9
  17. 5
  18. 46
  19. 3
  20. 86
  21. 35
  22. 71
  23. 69
  24. 50
  25. 49
  26. 85
  27. 59
  28. 48
  29. 84
  30. 87
  31. 21
  32. 27
  33. 89
  34. 67
  35. 56
  36. 24
  37. 44
  38. 88
  39. 32
  40. 23

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