← 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 29 · 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. 1.8 + ? = 10
  2. 2.9 + ? = 10
  3. 3.25 + ? = 100
  4. 4.3 + ? = 10
  5. 5.7 + ? = 10
  6. 6.5 + ? = 10
  7. 7.4 + ? = 10
  8. 8.54 + ? = 100
  9. 9.44 + ? = 100
  10. 10.34 + ? = 100
  11. 11.13 + ? = 100
  12. 12.2 + ? = 10
  13. 13.32 + ? = 100
  14. 14.71 + ? = 100
  15. 15.1 + ? = 10
  16. 16.51 + ? = 100
  17. 17.52 + ? = 100
  18. 18.89 + ? = 100
  19. 19.60 + ? = 100
  20. 20.12 + ? = 100
  21. 21.24 + ? = 100
  22. 22.15 + ? = 100
  23. 23.35 + ? = 100
  24. 24.37 + ? = 100
  25. 25.88 + ? = 100
  26. 26.23 + ? = 100
  27. 27.38 + ? = 100
  28. 28.27 + ? = 100
  29. 29.68 + ? = 100
  30. 30.6 + ? = 10
  31. 31.39 + ? = 100
  32. 32.76 + ? = 100
  33. 33.45 + ? = 100
  34. 34.58 + ? = 100
  35. 35.53 + ? = 100
  36. 36.73 + ? = 100
  37. 37.33 + ? = 100
  38. 38.84 + ? = 100
  39. 39.78 + ? = 100
  40. 40.75 + ? = 100

Answer key

  1. 2
  2. 1
  3. 75
  4. 7
  5. 3
  6. 5
  7. 6
  8. 46
  9. 56
  10. 66
  11. 87
  12. 8
  13. 68
  14. 29
  15. 9
  16. 49
  17. 48
  18. 11
  19. 40
  20. 88
  21. 76
  22. 85
  23. 65
  24. 63
  25. 12
  26. 77
  27. 62
  28. 73
  29. 32
  30. 4
  31. 61
  32. 24
  33. 55
  34. 42
  35. 47
  36. 27
  37. 67
  38. 16
  39. 22
  40. 25

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