← 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 310 · 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. 2.31 + ? = 100
  3. 3.1 + ? = 10
  4. 4.53 + ? = 100
  5. 5.75 + ? = 100
  6. 6.64 + ? = 100
  7. 7.32 + ? = 100
  8. 8.87 + ? = 100
  9. 9.44 + ? = 100
  10. 10.54 + ? = 100
  11. 11.67 + ? = 100
  12. 12.26 + ? = 100
  13. 13.82 + ? = 100
  14. 14.85 + ? = 100
  15. 15.11 + ? = 100
  16. 16.7 + ? = 10
  17. 17.74 + ? = 100
  18. 18.21 + ? = 100
  19. 19.30 + ? = 100
  20. 20.2 + ? = 10
  21. 21.4 + ? = 10
  22. 22.3 + ? = 10
  23. 23.5 + ? = 10
  24. 24.17 + ? = 100
  25. 25.6 + ? = 10
  26. 26.58 + ? = 100
  27. 27.84 + ? = 100
  28. 28.8 + ? = 10
  29. 29.65 + ? = 100
  30. 30.15 + ? = 100
  31. 31.18 + ? = 100
  32. 32.29 + ? = 100
  33. 33.24 + ? = 100
  34. 34.70 + ? = 100
  35. 35.50 + ? = 100
  36. 36.69 + ? = 100
  37. 37.89 + ? = 100
  38. 38.23 + ? = 100
  39. 39.43 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 1
  2. 69
  3. 9
  4. 47
  5. 25
  6. 36
  7. 68
  8. 13
  9. 56
  10. 46
  11. 33
  12. 74
  13. 18
  14. 15
  15. 89
  16. 3
  17. 26
  18. 79
  19. 70
  20. 8
  21. 6
  22. 7
  23. 5
  24. 83
  25. 4
  26. 42
  27. 16
  28. 2
  29. 35
  30. 85
  31. 82
  32. 71
  33. 76
  34. 30
  35. 50
  36. 31
  37. 11
  38. 77
  39. 57
  40. 23

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