← 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 635 · 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. 2.34 + ? = 100
  3. 3.9 + ? = 10
  4. 4.17 + ? = 100
  5. 5.18 + ? = 100
  6. 6.8 + ? = 10
  7. 7.7 + ? = 10
  8. 8.70 + ? = 100
  9. 9.40 + ? = 100
  10. 10.79 + ? = 100
  11. 11.6 + ? = 10
  12. 12.74 + ? = 100
  13. 13.83 + ? = 100
  14. 14.66 + ? = 100
  15. 15.5 + ? = 10
  16. 16.22 + ? = 100
  17. 17.2 + ? = 10
  18. 18.15 + ? = 100
  19. 19.13 + ? = 100
  20. 20.39 + ? = 100
  21. 21.62 + ? = 100
  22. 22.19 + ? = 100
  23. 23.47 + ? = 100
  24. 24.76 + ? = 100
  25. 25.55 + ? = 100
  26. 26.1 + ? = 10
  27. 27.81 + ? = 100
  28. 28.49 + ? = 100
  29. 29.52 + ? = 100
  30. 30.63 + ? = 100
  31. 31.3 + ? = 10
  32. 32.12 + ? = 100
  33. 33.61 + ? = 100
  34. 34.59 + ? = 100
  35. 35.72 + ? = 100
  36. 36.87 + ? = 100
  37. 37.16 + ? = 100
  38. 38.84 + ? = 100
  39. 39.80 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 6
  2. 66
  3. 1
  4. 83
  5. 82
  6. 2
  7. 3
  8. 30
  9. 60
  10. 21
  11. 4
  12. 26
  13. 17
  14. 34
  15. 5
  16. 78
  17. 8
  18. 85
  19. 87
  20. 61
  21. 38
  22. 81
  23. 53
  24. 24
  25. 45
  26. 9
  27. 19
  28. 51
  29. 48
  30. 37
  31. 7
  32. 88
  33. 39
  34. 41
  35. 28
  36. 13
  37. 84
  38. 16
  39. 20
  40. 27

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