← 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 745 · 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. 1.36 + ? = 100
  2. 2.7 + ? = 10
  3. 3.4 + ? = 10
  4. 4.31 + ? = 100
  5. 5.27 + ? = 100
  6. 6.86 + ? = 100
  7. 7.72 + ? = 100
  8. 8.23 + ? = 100
  9. 9.9 + ? = 10
  10. 10.74 + ? = 100
  11. 11.77 + ? = 100
  12. 12.21 + ? = 100
  13. 13.6 + ? = 10
  14. 14.66 + ? = 100
  15. 15.61 + ? = 100
  16. 16.8 + ? = 10
  17. 17.1 + ? = 10
  18. 18.18 + ? = 100
  19. 19.5 + ? = 10
  20. 20.3 + ? = 10
  21. 21.44 + ? = 100
  22. 22.47 + ? = 100
  23. 23.37 + ? = 100
  24. 24.51 + ? = 100
  25. 25.58 + ? = 100
  26. 26.65 + ? = 100
  27. 27.78 + ? = 100
  28. 28.83 + ? = 100
  29. 29.54 + ? = 100
  30. 30.49 + ? = 100
  31. 31.45 + ? = 100
  32. 32.52 + ? = 100
  33. 33.56 + ? = 100
  34. 34.20 + ? = 100
  35. 35.81 + ? = 100
  36. 36.15 + ? = 100
  37. 37.68 + ? = 100
  38. 38.43 + ? = 100
  39. 39.2 + ? = 10
  40. 40.87 + ? = 100

Answer key

  1. 64
  2. 3
  3. 6
  4. 69
  5. 73
  6. 14
  7. 28
  8. 77
  9. 1
  10. 26
  11. 23
  12. 79
  13. 4
  14. 34
  15. 39
  16. 2
  17. 9
  18. 82
  19. 5
  20. 7
  21. 56
  22. 53
  23. 63
  24. 49
  25. 42
  26. 35
  27. 22
  28. 17
  29. 46
  30. 51
  31. 55
  32. 48
  33. 44
  34. 80
  35. 19
  36. 85
  37. 32
  38. 57
  39. 8
  40. 13

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