← 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 91 · 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. 1.8 + ? = 10
  2. 2.82 + ? = 100
  3. 3.2 + ? = 10
  4. 4.6 + ? = 10
  5. 5.4 + ? = 10
  6. 6.56 + ? = 100
  7. 7.32 + ? = 100
  8. 8.9 + ? = 10
  9. 9.61 + ? = 100
  10. 10.3 + ? = 10
  11. 11.57 + ? = 100
  12. 12.1 + ? = 10
  13. 13.76 + ? = 100
  14. 14.34 + ? = 100
  15. 15.21 + ? = 100
  16. 16.51 + ? = 100
  17. 17.44 + ? = 100
  18. 18.5 + ? = 10
  19. 19.33 + ? = 100
  20. 20.20 + ? = 100
  21. 21.7 + ? = 10
  22. 22.70 + ? = 100
  23. 23.13 + ? = 100
  24. 24.77 + ? = 100
  25. 25.53 + ? = 100
  26. 26.17 + ? = 100
  27. 27.28 + ? = 100
  28. 28.64 + ? = 100
  29. 29.55 + ? = 100
  30. 30.12 + ? = 100
  31. 31.84 + ? = 100
  32. 32.27 + ? = 100
  33. 33.43 + ? = 100
  34. 34.86 + ? = 100
  35. 35.37 + ? = 100
  36. 36.52 + ? = 100
  37. 37.68 + ? = 100
  38. 38.22 + ? = 100
  39. 39.50 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 2
  2. 18
  3. 8
  4. 4
  5. 6
  6. 44
  7. 68
  8. 1
  9. 39
  10. 7
  11. 43
  12. 9
  13. 24
  14. 66
  15. 79
  16. 49
  17. 56
  18. 5
  19. 67
  20. 80
  21. 3
  22. 30
  23. 87
  24. 23
  25. 47
  26. 83
  27. 72
  28. 36
  29. 45
  30. 88
  31. 16
  32. 73
  33. 57
  34. 14
  35. 63
  36. 48
  37. 32
  38. 78
  39. 50
  40. 74

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