← 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 293 · 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. 1.37 + ? = 100
  2. 2.1 + ? = 10
  3. 3.2 + ? = 10
  4. 4.26 + ? = 100
  5. 5.28 + ? = 100
  6. 6.65 + ? = 100
  7. 7.12 + ? = 100
  8. 8.81 + ? = 100
  9. 9.46 + ? = 100
  10. 10.8 + ? = 10
  11. 11.7 + ? = 10
  12. 12.19 + ? = 100
  13. 13.4 + ? = 10
  14. 14.35 + ? = 100
  15. 15.6 + ? = 10
  16. 16.29 + ? = 100
  17. 17.17 + ? = 100
  18. 18.5 + ? = 10
  19. 19.75 + ? = 100
  20. 20.62 + ? = 100
  21. 21.51 + ? = 100
  22. 22.3 + ? = 10
  23. 23.22 + ? = 100
  24. 24.80 + ? = 100
  25. 25.43 + ? = 100
  26. 26.9 + ? = 10
  27. 27.39 + ? = 100
  28. 28.24 + ? = 100
  29. 29.84 + ? = 100
  30. 30.21 + ? = 100
  31. 31.48 + ? = 100
  32. 32.47 + ? = 100
  33. 33.40 + ? = 100
  34. 34.73 + ? = 100
  35. 35.41 + ? = 100
  36. 36.71 + ? = 100
  37. 37.87 + ? = 100
  38. 38.16 + ? = 100
  39. 39.14 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 63
  2. 9
  3. 8
  4. 74
  5. 72
  6. 35
  7. 88
  8. 19
  9. 54
  10. 2
  11. 3
  12. 81
  13. 6
  14. 65
  15. 4
  16. 71
  17. 83
  18. 5
  19. 25
  20. 38
  21. 49
  22. 7
  23. 78
  24. 20
  25. 57
  26. 1
  27. 61
  28. 76
  29. 16
  30. 79
  31. 52
  32. 53
  33. 60
  34. 27
  35. 59
  36. 29
  37. 13
  38. 84
  39. 86
  40. 80

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