← 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 332 · 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. 1.71 + ? = 100
  2. 2.86 + ? = 100
  3. 3.83 + ? = 100
  4. 4.2 + ? = 10
  5. 5.7 + ? = 10
  6. 6.3 + ? = 10
  7. 7.5 + ? = 10
  8. 8.25 + ? = 100
  9. 9.4 + ? = 10
  10. 10.18 + ? = 100
  11. 11.39 + ? = 100
  12. 12.70 + ? = 100
  13. 13.6 + ? = 10
  14. 14.77 + ? = 100
  15. 15.48 + ? = 100
  16. 16.1 + ? = 10
  17. 17.56 + ? = 100
  18. 18.55 + ? = 100
  19. 19.68 + ? = 100
  20. 20.33 + ? = 100
  21. 21.20 + ? = 100
  22. 22.31 + ? = 100
  23. 23.53 + ? = 100
  24. 24.63 + ? = 100
  25. 25.21 + ? = 100
  26. 26.37 + ? = 100
  27. 27.13 + ? = 100
  28. 28.30 + ? = 100
  29. 29.52 + ? = 100
  30. 30.45 + ? = 100
  31. 31.88 + ? = 100
  32. 32.38 + ? = 100
  33. 33.75 + ? = 100
  34. 34.15 + ? = 100
  35. 35.80 + ? = 100
  36. 36.9 + ? = 10
  37. 37.51 + ? = 100
  38. 38.61 + ? = 100
  39. 39.62 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 29
  2. 14
  3. 17
  4. 8
  5. 3
  6. 7
  7. 5
  8. 75
  9. 6
  10. 82
  11. 61
  12. 30
  13. 4
  14. 23
  15. 52
  16. 9
  17. 44
  18. 45
  19. 32
  20. 67
  21. 80
  22. 69
  23. 47
  24. 37
  25. 79
  26. 63
  27. 87
  28. 70
  29. 48
  30. 55
  31. 12
  32. 62
  33. 25
  34. 85
  35. 20
  36. 1
  37. 49
  38. 39
  39. 38
  40. 35

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