← 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 680 · 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. 1.85 + ? = 100
  2. 2.52 + ? = 100
  3. 3.8 + ? = 10
  4. 4.3 + ? = 10
  5. 5.82 + ? = 100
  6. 6.60 + ? = 100
  7. 7.76 + ? = 100
  8. 8.49 + ? = 100
  9. 9.9 + ? = 10
  10. 10.40 + ? = 100
  11. 11.61 + ? = 100
  12. 12.50 + ? = 100
  13. 13.7 + ? = 10
  14. 14.2 + ? = 10
  15. 15.4 + ? = 10
  16. 16.71 + ? = 100
  17. 17.67 + ? = 100
  18. 18.57 + ? = 100
  19. 19.68 + ? = 100
  20. 20.6 + ? = 10
  21. 21.5 + ? = 10
  22. 22.25 + ? = 100
  23. 23.18 + ? = 100
  24. 24.33 + ? = 100
  25. 25.46 + ? = 100
  26. 26.51 + ? = 100
  27. 27.39 + ? = 100
  28. 28.77 + ? = 100
  29. 29.72 + ? = 100
  30. 30.17 + ? = 100
  31. 31.41 + ? = 100
  32. 32.73 + ? = 100
  33. 33.37 + ? = 100
  34. 34.13 + ? = 100
  35. 35.19 + ? = 100
  36. 36.14 + ? = 100
  37. 37.45 + ? = 100
  38. 38.75 + ? = 100
  39. 39.55 + ? = 100
  40. 40.88 + ? = 100

Answer key

  1. 15
  2. 48
  3. 2
  4. 7
  5. 18
  6. 40
  7. 24
  8. 51
  9. 1
  10. 60
  11. 39
  12. 50
  13. 3
  14. 8
  15. 6
  16. 29
  17. 33
  18. 43
  19. 32
  20. 4
  21. 5
  22. 75
  23. 82
  24. 67
  25. 54
  26. 49
  27. 61
  28. 23
  29. 28
  30. 83
  31. 59
  32. 27
  33. 63
  34. 87
  35. 81
  36. 86
  37. 55
  38. 25
  39. 45
  40. 12

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