← 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 322 · 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. 2.16 + ? = 100
  3. 3.5 + ? = 10
  4. 4.2 + ? = 10
  5. 5.4 + ? = 10
  6. 6.75 + ? = 100
  7. 7.42 + ? = 100
  8. 8.54 + ? = 100
  9. 9.7 + ? = 10
  10. 10.6 + ? = 10
  11. 11.3 + ? = 10
  12. 12.27 + ? = 100
  13. 13.20 + ? = 100
  14. 14.32 + ? = 100
  15. 15.43 + ? = 100
  16. 16.78 + ? = 100
  17. 17.8 + ? = 10
  18. 18.38 + ? = 100
  19. 19.44 + ? = 100
  20. 20.86 + ? = 100
  21. 21.77 + ? = 100
  22. 22.19 + ? = 100
  23. 23.51 + ? = 100
  24. 24.1 + ? = 10
  25. 25.83 + ? = 100
  26. 26.22 + ? = 100
  27. 27.23 + ? = 100
  28. 28.26 + ? = 100
  29. 29.30 + ? = 100
  30. 30.69 + ? = 100
  31. 31.74 + ? = 100
  32. 32.82 + ? = 100
  33. 33.18 + ? = 100
  34. 34.71 + ? = 100
  35. 35.85 + ? = 100
  36. 36.35 + ? = 100
  37. 37.28 + ? = 100
  38. 38.84 + ? = 100
  39. 39.14 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 1
  2. 84
  3. 5
  4. 8
  5. 6
  6. 25
  7. 58
  8. 46
  9. 3
  10. 4
  11. 7
  12. 73
  13. 80
  14. 68
  15. 57
  16. 22
  17. 2
  18. 62
  19. 56
  20. 14
  21. 23
  22. 81
  23. 49
  24. 9
  25. 17
  26. 78
  27. 77
  28. 74
  29. 70
  30. 31
  31. 26
  32. 18
  33. 82
  34. 29
  35. 15
  36. 65
  37. 72
  38. 16
  39. 86
  40. 88

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