← 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 518 · 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. 1.6 + ? = 10
  2. 2.4 + ? = 10
  3. 3.85 + ? = 100
  4. 4.78 + ? = 100
  5. 5.1 + ? = 10
  6. 6.3 + ? = 10
  7. 7.12 + ? = 100
  8. 8.60 + ? = 100
  9. 9.5 + ? = 10
  10. 10.2 + ? = 10
  11. 11.7 + ? = 10
  12. 12.46 + ? = 100
  13. 13.8 + ? = 10
  14. 14.9 + ? = 10
  15. 15.54 + ? = 100
  16. 16.71 + ? = 100
  17. 17.32 + ? = 100
  18. 18.30 + ? = 100
  19. 19.68 + ? = 100
  20. 20.18 + ? = 100
  21. 21.61 + ? = 100
  22. 22.40 + ? = 100
  23. 23.55 + ? = 100
  24. 24.47 + ? = 100
  25. 25.52 + ? = 100
  26. 26.49 + ? = 100
  27. 27.45 + ? = 100
  28. 28.83 + ? = 100
  29. 29.20 + ? = 100
  30. 30.65 + ? = 100
  31. 31.39 + ? = 100
  32. 32.67 + ? = 100
  33. 33.27 + ? = 100
  34. 34.82 + ? = 100
  35. 35.31 + ? = 100
  36. 36.88 + ? = 100
  37. 37.56 + ? = 100
  38. 38.77 + ? = 100
  39. 39.42 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 4
  2. 6
  3. 15
  4. 22
  5. 9
  6. 7
  7. 88
  8. 40
  9. 5
  10. 8
  11. 3
  12. 54
  13. 2
  14. 1
  15. 46
  16. 29
  17. 68
  18. 70
  19. 32
  20. 82
  21. 39
  22. 60
  23. 45
  24. 53
  25. 48
  26. 51
  27. 55
  28. 17
  29. 80
  30. 35
  31. 61
  32. 33
  33. 73
  34. 18
  35. 69
  36. 12
  37. 44
  38. 23
  39. 58
  40. 76

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