← 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 737 · 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. 1.77 + ? = 100
  2. 2.7 + ? = 10
  3. 3.87 + ? = 100
  4. 4.6 + ? = 10
  5. 5.4 + ? = 10
  6. 6.2 + ? = 10
  7. 7.22 + ? = 100
  8. 8.89 + ? = 100
  9. 9.31 + ? = 100
  10. 10.3 + ? = 10
  11. 11.27 + ? = 100
  12. 12.9 + ? = 10
  13. 13.88 + ? = 100
  14. 14.5 + ? = 10
  15. 15.24 + ? = 100
  16. 16.1 + ? = 10
  17. 17.18 + ? = 100
  18. 18.79 + ? = 100
  19. 19.36 + ? = 100
  20. 20.58 + ? = 100
  21. 21.39 + ? = 100
  22. 22.80 + ? = 100
  23. 23.76 + ? = 100
  24. 24.29 + ? = 100
  25. 25.49 + ? = 100
  26. 26.41 + ? = 100
  27. 27.23 + ? = 100
  28. 28.52 + ? = 100
  29. 29.51 + ? = 100
  30. 30.56 + ? = 100
  31. 31.66 + ? = 100
  32. 32.16 + ? = 100
  33. 33.69 + ? = 100
  34. 34.43 + ? = 100
  35. 35.8 + ? = 10
  36. 36.68 + ? = 100
  37. 37.45 + ? = 100
  38. 38.57 + ? = 100
  39. 39.48 + ? = 100
  40. 40.78 + ? = 100

Answer key

  1. 23
  2. 3
  3. 13
  4. 4
  5. 6
  6. 8
  7. 78
  8. 11
  9. 69
  10. 7
  11. 73
  12. 1
  13. 12
  14. 5
  15. 76
  16. 9
  17. 82
  18. 21
  19. 64
  20. 42
  21. 61
  22. 20
  23. 24
  24. 71
  25. 51
  26. 59
  27. 77
  28. 48
  29. 49
  30. 44
  31. 34
  32. 84
  33. 31
  34. 57
  35. 2
  36. 32
  37. 55
  38. 43
  39. 52
  40. 22

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