← 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 914 · 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. 1.7 + ? = 10
  2. 2.6 + ? = 10
  3. 3.79 + ? = 100
  4. 4.67 + ? = 100
  5. 5.17 + ? = 100
  6. 6.57 + ? = 100
  7. 7.3 + ? = 10
  8. 8.43 + ? = 100
  9. 9.63 + ? = 100
  10. 10.45 + ? = 100
  11. 11.8 + ? = 10
  12. 12.29 + ? = 100
  13. 13.5 + ? = 10
  14. 14.4 + ? = 10
  15. 15.12 + ? = 100
  16. 16.20 + ? = 100
  17. 17.81 + ? = 100
  18. 18.19 + ? = 100
  19. 19.9 + ? = 10
  20. 20.68 + ? = 100
  21. 21.74 + ? = 100
  22. 22.26 + ? = 100
  23. 23.39 + ? = 100
  24. 24.87 + ? = 100
  25. 25.36 + ? = 100
  26. 26.50 + ? = 100
  27. 27.27 + ? = 100
  28. 28.2 + ? = 10
  29. 29.15 + ? = 100
  30. 30.78 + ? = 100
  31. 31.41 + ? = 100
  32. 32.52 + ? = 100
  33. 33.1 + ? = 10
  34. 34.13 + ? = 100
  35. 35.49 + ? = 100
  36. 36.38 + ? = 100
  37. 37.75 + ? = 100
  38. 38.28 + ? = 100
  39. 39.37 + ? = 100
  40. 40.69 + ? = 100

Answer key

  1. 3
  2. 4
  3. 21
  4. 33
  5. 83
  6. 43
  7. 7
  8. 57
  9. 37
  10. 55
  11. 2
  12. 71
  13. 5
  14. 6
  15. 88
  16. 80
  17. 19
  18. 81
  19. 1
  20. 32
  21. 26
  22. 74
  23. 61
  24. 13
  25. 64
  26. 50
  27. 73
  28. 8
  29. 85
  30. 22
  31. 59
  32. 48
  33. 9
  34. 87
  35. 51
  36. 62
  37. 25
  38. 72
  39. 63
  40. 31

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