← 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 523 · 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. 1.7 + ? = 10
  2. 2.84 + ? = 100
  3. 3.2 + ? = 10
  4. 4.6 + ? = 10
  5. 5.3 + ? = 10
  6. 6.4 + ? = 10
  7. 7.76 + ? = 100
  8. 8.56 + ? = 100
  9. 9.54 + ? = 100
  10. 10.62 + ? = 100
  11. 11.1 + ? = 10
  12. 12.19 + ? = 100
  13. 13.47 + ? = 100
  14. 14.14 + ? = 100
  15. 15.32 + ? = 100
  16. 16.40 + ? = 100
  17. 17.77 + ? = 100
  18. 18.44 + ? = 100
  19. 19.9 + ? = 10
  20. 20.8 + ? = 10
  21. 21.45 + ? = 100
  22. 22.58 + ? = 100
  23. 23.29 + ? = 100
  24. 24.64 + ? = 100
  25. 25.25 + ? = 100
  26. 26.66 + ? = 100
  27. 27.50 + ? = 100
  28. 28.36 + ? = 100
  29. 29.12 + ? = 100
  30. 30.5 + ? = 10
  31. 31.71 + ? = 100
  32. 32.83 + ? = 100
  33. 33.42 + ? = 100
  34. 34.22 + ? = 100
  35. 35.16 + ? = 100
  36. 36.17 + ? = 100
  37. 37.57 + ? = 100
  38. 38.13 + ? = 100
  39. 39.30 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 3
  2. 16
  3. 8
  4. 4
  5. 7
  6. 6
  7. 24
  8. 44
  9. 46
  10. 38
  11. 9
  12. 81
  13. 53
  14. 86
  15. 68
  16. 60
  17. 23
  18. 56
  19. 1
  20. 2
  21. 55
  22. 42
  23. 71
  24. 36
  25. 75
  26. 34
  27. 50
  28. 64
  29. 88
  30. 5
  31. 29
  32. 17
  33. 58
  34. 78
  35. 84
  36. 83
  37. 43
  38. 87
  39. 70
  40. 67

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