← 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 598 · 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. 1.25 + ? = 100
  2. 2.8 + ? = 10
  3. 3.1 + ? = 10
  4. 4.81 + ? = 100
  5. 5.6 + ? = 10
  6. 6.30 + ? = 100
  7. 7.7 + ? = 10
  8. 8.82 + ? = 100
  9. 9.84 + ? = 100
  10. 10.4 + ? = 10
  11. 11.35 + ? = 100
  12. 12.5 + ? = 10
  13. 13.3 + ? = 10
  14. 14.23 + ? = 100
  15. 15.79 + ? = 100
  16. 16.37 + ? = 100
  17. 17.58 + ? = 100
  18. 18.26 + ? = 100
  19. 19.69 + ? = 100
  20. 20.63 + ? = 100
  21. 21.32 + ? = 100
  22. 22.73 + ? = 100
  23. 23.43 + ? = 100
  24. 24.55 + ? = 100
  25. 25.9 + ? = 10
  26. 26.71 + ? = 100
  27. 27.46 + ? = 100
  28. 28.47 + ? = 100
  29. 29.11 + ? = 100
  30. 30.36 + ? = 100
  31. 31.22 + ? = 100
  32. 32.75 + ? = 100
  33. 33.16 + ? = 100
  34. 34.2 + ? = 10
  35. 35.20 + ? = 100
  36. 36.86 + ? = 100
  37. 37.74 + ? = 100
  38. 38.27 + ? = 100
  39. 39.41 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 75
  2. 2
  3. 9
  4. 19
  5. 4
  6. 70
  7. 3
  8. 18
  9. 16
  10. 6
  11. 65
  12. 5
  13. 7
  14. 77
  15. 21
  16. 63
  17. 42
  18. 74
  19. 31
  20. 37
  21. 68
  22. 27
  23. 57
  24. 45
  25. 1
  26. 29
  27. 54
  28. 53
  29. 89
  30. 64
  31. 78
  32. 25
  33. 84
  34. 8
  35. 80
  36. 14
  37. 26
  38. 73
  39. 59
  40. 51

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