← 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 928 · 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. 1.12 + ? = 100
  2. 2.72 + ? = 100
  3. 3.3 + ? = 10
  4. 4.20 + ? = 100
  5. 5.67 + ? = 100
  6. 6.60 + ? = 100
  7. 7.6 + ? = 10
  8. 8.7 + ? = 10
  9. 9.21 + ? = 100
  10. 10.73 + ? = 100
  11. 11.31 + ? = 100
  12. 12.41 + ? = 100
  13. 13.81 + ? = 100
  14. 14.8 + ? = 10
  15. 15.80 + ? = 100
  16. 16.30 + ? = 100
  17. 17.36 + ? = 100
  18. 18.1 + ? = 10
  19. 19.87 + ? = 100
  20. 20.89 + ? = 100
  21. 21.5 + ? = 10
  22. 22.45 + ? = 100
  23. 23.52 + ? = 100
  24. 24.13 + ? = 100
  25. 25.2 + ? = 10
  26. 26.66 + ? = 100
  27. 27.37 + ? = 100
  28. 28.44 + ? = 100
  29. 29.4 + ? = 10
  30. 30.9 + ? = 10
  31. 31.53 + ? = 100
  32. 32.19 + ? = 100
  33. 33.38 + ? = 100
  34. 34.88 + ? = 100
  35. 35.55 + ? = 100
  36. 36.24 + ? = 100
  37. 37.39 + ? = 100
  38. 38.35 + ? = 100
  39. 39.32 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 88
  2. 28
  3. 7
  4. 80
  5. 33
  6. 40
  7. 4
  8. 3
  9. 79
  10. 27
  11. 69
  12. 59
  13. 19
  14. 2
  15. 20
  16. 70
  17. 64
  18. 9
  19. 13
  20. 11
  21. 5
  22. 55
  23. 48
  24. 87
  25. 8
  26. 34
  27. 63
  28. 56
  29. 6
  30. 1
  31. 47
  32. 81
  33. 62
  34. 12
  35. 45
  36. 76
  37. 61
  38. 65
  39. 68
  40. 26

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