← 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 317 · 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. 1.63 + ? = 100
  2. 2.28 + ? = 100
  3. 3.4 + ? = 10
  4. 4.67 + ? = 100
  5. 5.9 + ? = 10
  6. 6.1 + ? = 10
  7. 7.74 + ? = 100
  8. 8.66 + ? = 100
  9. 9.49 + ? = 100
  10. 10.8 + ? = 10
  11. 11.54 + ? = 100
  12. 12.3 + ? = 10
  13. 13.43 + ? = 100
  14. 14.77 + ? = 100
  15. 15.73 + ? = 100
  16. 16.61 + ? = 100
  17. 17.5 + ? = 10
  18. 18.14 + ? = 100
  19. 19.59 + ? = 100
  20. 20.64 + ? = 100
  21. 21.2 + ? = 10
  22. 22.17 + ? = 100
  23. 23.33 + ? = 100
  24. 24.13 + ? = 100
  25. 25.30 + ? = 100
  26. 26.7 + ? = 10
  27. 27.44 + ? = 100
  28. 28.36 + ? = 100
  29. 29.53 + ? = 100
  30. 30.45 + ? = 100
  31. 31.72 + ? = 100
  32. 32.79 + ? = 100
  33. 33.87 + ? = 100
  34. 34.22 + ? = 100
  35. 35.26 + ? = 100
  36. 36.15 + ? = 100
  37. 37.76 + ? = 100
  38. 38.35 + ? = 100
  39. 39.25 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 37
  2. 72
  3. 6
  4. 33
  5. 1
  6. 9
  7. 26
  8. 34
  9. 51
  10. 2
  11. 46
  12. 7
  13. 57
  14. 23
  15. 27
  16. 39
  17. 5
  18. 86
  19. 41
  20. 36
  21. 8
  22. 83
  23. 67
  24. 87
  25. 70
  26. 3
  27. 56
  28. 64
  29. 47
  30. 55
  31. 28
  32. 21
  33. 13
  34. 78
  35. 74
  36. 85
  37. 24
  38. 65
  39. 75
  40. 40

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