← 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 806 · 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. 1.89 + ? = 100
  2. 2.78 + ? = 100
  3. 3.38 + ? = 100
  4. 4.22 + ? = 100
  5. 5.5 + ? = 10
  6. 6.8 + ? = 10
  7. 7.55 + ? = 100
  8. 8.4 + ? = 10
  9. 9.2 + ? = 10
  10. 10.6 + ? = 10
  11. 11.49 + ? = 100
  12. 12.69 + ? = 100
  13. 13.47 + ? = 100
  14. 14.7 + ? = 10
  15. 15.33 + ? = 100
  16. 16.88 + ? = 100
  17. 17.32 + ? = 100
  18. 18.19 + ? = 100
  19. 19.18 + ? = 100
  20. 20.3 + ? = 10
  21. 21.37 + ? = 100
  22. 22.76 + ? = 100
  23. 23.75 + ? = 100
  24. 24.9 + ? = 10
  25. 25.58 + ? = 100
  26. 26.24 + ? = 100
  27. 27.59 + ? = 100
  28. 28.52 + ? = 100
  29. 29.45 + ? = 100
  30. 30.15 + ? = 100
  31. 31.16 + ? = 100
  32. 32.68 + ? = 100
  33. 33.65 + ? = 100
  34. 34.83 + ? = 100
  35. 35.1 + ? = 10
  36. 36.50 + ? = 100
  37. 37.85 + ? = 100
  38. 38.43 + ? = 100
  39. 39.14 + ? = 100
  40. 40.36 + ? = 100

Answer key

  1. 11
  2. 22
  3. 62
  4. 78
  5. 5
  6. 2
  7. 45
  8. 6
  9. 8
  10. 4
  11. 51
  12. 31
  13. 53
  14. 3
  15. 67
  16. 12
  17. 68
  18. 81
  19. 82
  20. 7
  21. 63
  22. 24
  23. 25
  24. 1
  25. 42
  26. 76
  27. 41
  28. 48
  29. 55
  30. 85
  31. 84
  32. 32
  33. 35
  34. 17
  35. 9
  36. 50
  37. 15
  38. 57
  39. 86
  40. 64

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