← 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 249 · 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. 1.9 + ? = 10
  2. 2.74 + ? = 100
  3. 3.65 + ? = 100
  4. 4.61 + ? = 100
  5. 5.5 + ? = 10
  6. 6.84 + ? = 100
  7. 7.44 + ? = 100
  8. 8.3 + ? = 10
  9. 9.64 + ? = 100
  10. 10.17 + ? = 100
  11. 11.7 + ? = 10
  12. 12.63 + ? = 100
  13. 13.11 + ? = 100
  14. 14.6 + ? = 10
  15. 15.31 + ? = 100
  16. 16.34 + ? = 100
  17. 17.53 + ? = 100
  18. 18.4 + ? = 10
  19. 19.32 + ? = 100
  20. 20.55 + ? = 100
  21. 21.83 + ? = 100
  22. 22.1 + ? = 10
  23. 23.2 + ? = 10
  24. 24.45 + ? = 100
  25. 25.88 + ? = 100
  26. 26.8 + ? = 10
  27. 27.73 + ? = 100
  28. 28.48 + ? = 100
  29. 29.18 + ? = 100
  30. 30.87 + ? = 100
  31. 31.24 + ? = 100
  32. 32.20 + ? = 100
  33. 33.12 + ? = 100
  34. 34.15 + ? = 100
  35. 35.51 + ? = 100
  36. 36.43 + ? = 100
  37. 37.23 + ? = 100
  38. 38.22 + ? = 100
  39. 39.62 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 1
  2. 26
  3. 35
  4. 39
  5. 5
  6. 16
  7. 56
  8. 7
  9. 36
  10. 83
  11. 3
  12. 37
  13. 89
  14. 4
  15. 69
  16. 66
  17. 47
  18. 6
  19. 68
  20. 45
  21. 17
  22. 9
  23. 8
  24. 55
  25. 12
  26. 2
  27. 27
  28. 52
  29. 82
  30. 13
  31. 76
  32. 80
  33. 88
  34. 85
  35. 49
  36. 57
  37. 77
  38. 78
  39. 38
  40. 15

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