← 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 314 · 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. 1.34 + ? = 100
  2. 2.43 + ? = 100
  3. 3.1 + ? = 10
  4. 4.77 + ? = 100
  5. 5.56 + ? = 100
  6. 6.87 + ? = 100
  7. 7.54 + ? = 100
  8. 8.6 + ? = 10
  9. 9.37 + ? = 100
  10. 10.7 + ? = 10
  11. 11.4 + ? = 10
  12. 12.79 + ? = 100
  13. 13.8 + ? = 10
  14. 14.9 + ? = 10
  15. 15.35 + ? = 100
  16. 16.55 + ? = 100
  17. 17.5 + ? = 10
  18. 18.40 + ? = 100
  19. 19.38 + ? = 100
  20. 20.15 + ? = 100
  21. 21.2 + ? = 10
  22. 22.3 + ? = 10
  23. 23.28 + ? = 100
  24. 24.53 + ? = 100
  25. 25.69 + ? = 100
  26. 26.24 + ? = 100
  27. 27.13 + ? = 100
  28. 28.42 + ? = 100
  29. 29.30 + ? = 100
  30. 30.44 + ? = 100
  31. 31.48 + ? = 100
  32. 32.88 + ? = 100
  33. 33.18 + ? = 100
  34. 34.32 + ? = 100
  35. 35.75 + ? = 100
  36. 36.80 + ? = 100
  37. 37.29 + ? = 100
  38. 38.16 + ? = 100
  39. 39.46 + ? = 100
  40. 40.52 + ? = 100

Answer key

  1. 66
  2. 57
  3. 9
  4. 23
  5. 44
  6. 13
  7. 46
  8. 4
  9. 63
  10. 3
  11. 6
  12. 21
  13. 2
  14. 1
  15. 65
  16. 45
  17. 5
  18. 60
  19. 62
  20. 85
  21. 8
  22. 7
  23. 72
  24. 47
  25. 31
  26. 76
  27. 87
  28. 58
  29. 70
  30. 56
  31. 52
  32. 12
  33. 82
  34. 68
  35. 25
  36. 20
  37. 71
  38. 84
  39. 54
  40. 48

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