← 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 549 · 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. 1.1 + ? = 10
  2. 2.8 + ? = 10
  3. 3.45 + ? = 100
  4. 4.55 + ? = 100
  5. 5.68 + ? = 100
  6. 6.17 + ? = 100
  7. 7.89 + ? = 100
  8. 8.2 + ? = 10
  9. 9.28 + ? = 100
  10. 10.3 + ? = 10
  11. 11.52 + ? = 100
  12. 12.30 + ? = 100
  13. 13.37 + ? = 100
  14. 14.7 + ? = 10
  15. 15.76 + ? = 100
  16. 16.9 + ? = 10
  17. 17.5 + ? = 10
  18. 18.4 + ? = 10
  19. 19.84 + ? = 100
  20. 20.22 + ? = 100
  21. 21.66 + ? = 100
  22. 22.59 + ? = 100
  23. 23.33 + ? = 100
  24. 24.27 + ? = 100
  25. 25.6 + ? = 10
  26. 26.87 + ? = 100
  27. 27.35 + ? = 100
  28. 28.82 + ? = 100
  29. 29.38 + ? = 100
  30. 30.69 + ? = 100
  31. 31.78 + ? = 100
  32. 32.60 + ? = 100
  33. 33.12 + ? = 100
  34. 34.86 + ? = 100
  35. 35.72 + ? = 100
  36. 36.14 + ? = 100
  37. 37.56 + ? = 100
  38. 38.71 + ? = 100
  39. 39.44 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 9
  2. 2
  3. 55
  4. 45
  5. 32
  6. 83
  7. 11
  8. 8
  9. 72
  10. 7
  11. 48
  12. 70
  13. 63
  14. 3
  15. 24
  16. 1
  17. 5
  18. 6
  19. 16
  20. 78
  21. 34
  22. 41
  23. 67
  24. 73
  25. 4
  26. 13
  27. 65
  28. 18
  29. 62
  30. 31
  31. 22
  32. 40
  33. 88
  34. 14
  35. 28
  36. 86
  37. 44
  38. 29
  39. 56
  40. 43

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