← 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 84 · 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. 1.3 + ? = 10
  2. 2.17 + ? = 100
  3. 3.44 + ? = 100
  4. 4.15 + ? = 100
  5. 5.50 + ? = 100
  6. 6.83 + ? = 100
  7. 7.6 + ? = 10
  8. 8.7 + ? = 10
  9. 9.28 + ? = 100
  10. 10.73 + ? = 100
  11. 11.2 + ? = 10
  12. 12.72 + ? = 100
  13. 13.46 + ? = 100
  14. 14.60 + ? = 100
  15. 15.27 + ? = 100
  16. 16.4 + ? = 10
  17. 17.67 + ? = 100
  18. 18.8 + ? = 10
  19. 19.9 + ? = 10
  20. 20.1 + ? = 10
  21. 21.35 + ? = 100
  22. 22.14 + ? = 100
  23. 23.18 + ? = 100
  24. 24.5 + ? = 10
  25. 25.64 + ? = 100
  26. 26.74 + ? = 100
  27. 27.45 + ? = 100
  28. 28.89 + ? = 100
  29. 29.43 + ? = 100
  30. 30.31 + ? = 100
  31. 31.81 + ? = 100
  32. 32.62 + ? = 100
  33. 33.79 + ? = 100
  34. 34.70 + ? = 100
  35. 35.76 + ? = 100
  36. 36.20 + ? = 100
  37. 37.84 + ? = 100
  38. 38.29 + ? = 100
  39. 39.49 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 7
  2. 83
  3. 56
  4. 85
  5. 50
  6. 17
  7. 4
  8. 3
  9. 72
  10. 27
  11. 8
  12. 28
  13. 54
  14. 40
  15. 73
  16. 6
  17. 33
  18. 2
  19. 1
  20. 9
  21. 65
  22. 86
  23. 82
  24. 5
  25. 36
  26. 26
  27. 55
  28. 11
  29. 57
  30. 69
  31. 19
  32. 38
  33. 21
  34. 30
  35. 24
  36. 80
  37. 16
  38. 71
  39. 51
  40. 66

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