← 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 122 · 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. 1.3 + ? = 10
  2. 2.50 + ? = 100
  3. 3.28 + ? = 100
  4. 4.8 + ? = 10
  5. 5.48 + ? = 100
  6. 6.29 + ? = 100
  7. 7.34 + ? = 100
  8. 8.80 + ? = 100
  9. 9.22 + ? = 100
  10. 10.5 + ? = 10
  11. 11.39 + ? = 100
  12. 12.15 + ? = 100
  13. 13.83 + ? = 100
  14. 14.65 + ? = 100
  15. 15.26 + ? = 100
  16. 16.58 + ? = 100
  17. 17.12 + ? = 100
  18. 18.16 + ? = 100
  19. 19.9 + ? = 10
  20. 20.72 + ? = 100
  21. 21.4 + ? = 10
  22. 22.36 + ? = 100
  23. 23.52 + ? = 100
  24. 24.27 + ? = 100
  25. 25.74 + ? = 100
  26. 26.17 + ? = 100
  27. 27.37 + ? = 100
  28. 28.20 + ? = 100
  29. 29.11 + ? = 100
  30. 30.2 + ? = 10
  31. 31.84 + ? = 100
  32. 32.14 + ? = 100
  33. 33.60 + ? = 100
  34. 34.18 + ? = 100
  35. 35.1 + ? = 10
  36. 36.42 + ? = 100
  37. 37.67 + ? = 100
  38. 38.49 + ? = 100
  39. 39.33 + ? = 100
  40. 40.23 + ? = 100

Answer key

  1. 7
  2. 50
  3. 72
  4. 2
  5. 52
  6. 71
  7. 66
  8. 20
  9. 78
  10. 5
  11. 61
  12. 85
  13. 17
  14. 35
  15. 74
  16. 42
  17. 88
  18. 84
  19. 1
  20. 28
  21. 6
  22. 64
  23. 48
  24. 73
  25. 26
  26. 83
  27. 63
  28. 80
  29. 89
  30. 8
  31. 16
  32. 86
  33. 40
  34. 82
  35. 9
  36. 58
  37. 33
  38. 51
  39. 67
  40. 77

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