← 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 74 · 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. 1.1 + ? = 10
  2. 2.5 + ? = 10
  3. 3.51 + ? = 100
  4. 4.17 + ? = 100
  5. 5.7 + ? = 10
  6. 6.6 + ? = 10
  7. 7.9 + ? = 10
  8. 8.4 + ? = 10
  9. 9.11 + ? = 100
  10. 10.80 + ? = 100
  11. 11.45 + ? = 100
  12. 12.2 + ? = 10
  13. 13.47 + ? = 100
  14. 14.72 + ? = 100
  15. 15.23 + ? = 100
  16. 16.37 + ? = 100
  17. 17.66 + ? = 100
  18. 18.8 + ? = 10
  19. 19.44 + ? = 100
  20. 20.84 + ? = 100
  21. 21.28 + ? = 100
  22. 22.85 + ? = 100
  23. 23.38 + ? = 100
  24. 24.57 + ? = 100
  25. 25.24 + ? = 100
  26. 26.25 + ? = 100
  27. 27.70 + ? = 100
  28. 28.64 + ? = 100
  29. 29.19 + ? = 100
  30. 30.77 + ? = 100
  31. 31.61 + ? = 100
  32. 32.32 + ? = 100
  33. 33.31 + ? = 100
  34. 34.41 + ? = 100
  35. 35.20 + ? = 100
  36. 36.26 + ? = 100
  37. 37.33 + ? = 100
  38. 38.34 + ? = 100
  39. 39.43 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 9
  2. 5
  3. 49
  4. 83
  5. 3
  6. 4
  7. 1
  8. 6
  9. 89
  10. 20
  11. 55
  12. 8
  13. 53
  14. 28
  15. 77
  16. 63
  17. 34
  18. 2
  19. 56
  20. 16
  21. 72
  22. 15
  23. 62
  24. 43
  25. 76
  26. 75
  27. 30
  28. 36
  29. 81
  30. 23
  31. 39
  32. 68
  33. 69
  34. 59
  35. 80
  36. 74
  37. 67
  38. 66
  39. 57
  40. 24

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