← 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 527 · 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. 1.79 + ? = 100
  2. 2.52 + ? = 100
  3. 3.12 + ? = 100
  4. 4.41 + ? = 100
  5. 5.4 + ? = 10
  6. 6.1 + ? = 10
  7. 7.3 + ? = 10
  8. 8.11 + ? = 100
  9. 9.53 + ? = 100
  10. 10.6 + ? = 10
  11. 11.77 + ? = 100
  12. 12.8 + ? = 10
  13. 13.69 + ? = 100
  14. 14.2 + ? = 10
  15. 15.13 + ? = 100
  16. 16.7 + ? = 10
  17. 17.32 + ? = 100
  18. 18.54 + ? = 100
  19. 19.21 + ? = 100
  20. 20.65 + ? = 100
  21. 21.33 + ? = 100
  22. 22.14 + ? = 100
  23. 23.20 + ? = 100
  24. 24.67 + ? = 100
  25. 25.5 + ? = 10
  26. 26.70 + ? = 100
  27. 27.50 + ? = 100
  28. 28.72 + ? = 100
  29. 29.63 + ? = 100
  30. 30.34 + ? = 100
  31. 31.74 + ? = 100
  32. 32.45 + ? = 100
  33. 33.59 + ? = 100
  34. 34.66 + ? = 100
  35. 35.37 + ? = 100
  36. 36.9 + ? = 10
  37. 37.85 + ? = 100
  38. 38.60 + ? = 100
  39. 39.38 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 21
  2. 48
  3. 88
  4. 59
  5. 6
  6. 9
  7. 7
  8. 89
  9. 47
  10. 4
  11. 23
  12. 2
  13. 31
  14. 8
  15. 87
  16. 3
  17. 68
  18. 46
  19. 79
  20. 35
  21. 67
  22. 86
  23. 80
  24. 33
  25. 5
  26. 30
  27. 50
  28. 28
  29. 37
  30. 66
  31. 26
  32. 55
  33. 41
  34. 34
  35. 63
  36. 1
  37. 15
  38. 40
  39. 62
  40. 60

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