← 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 510 · 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. 1.4 + ? = 10
  2. 2.9 + ? = 10
  3. 3.5 + ? = 10
  4. 4.3 + ? = 10
  5. 5.57 + ? = 100
  6. 6.7 + ? = 10
  7. 7.63 + ? = 100
  8. 8.37 + ? = 100
  9. 9.86 + ? = 100
  10. 10.40 + ? = 100
  11. 11.31 + ? = 100
  12. 12.27 + ? = 100
  13. 13.66 + ? = 100
  14. 14.88 + ? = 100
  15. 15.64 + ? = 100
  16. 16.55 + ? = 100
  17. 17.25 + ? = 100
  18. 18.33 + ? = 100
  19. 19.70 + ? = 100
  20. 20.11 + ? = 100
  21. 21.81 + ? = 100
  22. 22.80 + ? = 100
  23. 23.12 + ? = 100
  24. 24.75 + ? = 100
  25. 25.2 + ? = 10
  26. 26.16 + ? = 100
  27. 27.50 + ? = 100
  28. 28.68 + ? = 100
  29. 29.17 + ? = 100
  30. 30.41 + ? = 100
  31. 31.26 + ? = 100
  32. 32.32 + ? = 100
  33. 33.82 + ? = 100
  34. 34.79 + ? = 100
  35. 35.77 + ? = 100
  36. 36.87 + ? = 100
  37. 37.42 + ? = 100
  38. 38.8 + ? = 10
  39. 39.6 + ? = 10
  40. 40.46 + ? = 100

Answer key

  1. 6
  2. 1
  3. 5
  4. 7
  5. 43
  6. 3
  7. 37
  8. 63
  9. 14
  10. 60
  11. 69
  12. 73
  13. 34
  14. 12
  15. 36
  16. 45
  17. 75
  18. 67
  19. 30
  20. 89
  21. 19
  22. 20
  23. 88
  24. 25
  25. 8
  26. 84
  27. 50
  28. 32
  29. 83
  30. 59
  31. 74
  32. 68
  33. 18
  34. 21
  35. 23
  36. 13
  37. 58
  38. 2
  39. 4
  40. 54

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