← 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 653 · 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. 1.4 + ? = 10
  2. 2.50 + ? = 100
  3. 3.2 + ? = 10
  4. 4.49 + ? = 100
  5. 5.5 + ? = 10
  6. 6.6 + ? = 10
  7. 7.8 + ? = 10
  8. 8.28 + ? = 100
  9. 9.7 + ? = 10
  10. 10.57 + ? = 100
  11. 11.87 + ? = 100
  12. 12.18 + ? = 100
  13. 13.21 + ? = 100
  14. 14.72 + ? = 100
  15. 15.59 + ? = 100
  16. 16.48 + ? = 100
  17. 17.3 + ? = 10
  18. 18.81 + ? = 100
  19. 19.64 + ? = 100
  20. 20.14 + ? = 100
  21. 21.33 + ? = 100
  22. 22.29 + ? = 100
  23. 23.79 + ? = 100
  24. 24.30 + ? = 100
  25. 25.42 + ? = 100
  26. 26.11 + ? = 100
  27. 27.32 + ? = 100
  28. 28.63 + ? = 100
  29. 29.68 + ? = 100
  30. 30.16 + ? = 100
  31. 31.47 + ? = 100
  32. 32.23 + ? = 100
  33. 33.31 + ? = 100
  34. 34.1 + ? = 10
  35. 35.70 + ? = 100
  36. 36.43 + ? = 100
  37. 37.73 + ? = 100
  38. 38.9 + ? = 10
  39. 39.80 + ? = 100
  40. 40.54 + ? = 100

Answer key

  1. 6
  2. 50
  3. 8
  4. 51
  5. 5
  6. 4
  7. 2
  8. 72
  9. 3
  10. 43
  11. 13
  12. 82
  13. 79
  14. 28
  15. 41
  16. 52
  17. 7
  18. 19
  19. 36
  20. 86
  21. 67
  22. 71
  23. 21
  24. 70
  25. 58
  26. 89
  27. 68
  28. 37
  29. 32
  30. 84
  31. 53
  32. 77
  33. 69
  34. 9
  35. 30
  36. 57
  37. 27
  38. 1
  39. 20
  40. 46

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