← 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 439 · 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. 2.77 + ? = 100
  3. 3.84 + ? = 100
  4. 4.2 + ? = 10
  5. 5.45 + ? = 100
  6. 6.38 + ? = 100
  7. 7.3 + ? = 10
  8. 8.88 + ? = 100
  9. 9.15 + ? = 100
  10. 10.4 + ? = 10
  11. 11.50 + ? = 100
  12. 12.5 + ? = 10
  13. 13.76 + ? = 100
  14. 14.9 + ? = 10
  15. 15.7 + ? = 10
  16. 16.32 + ? = 100
  17. 17.58 + ? = 100
  18. 18.41 + ? = 100
  19. 19.1 + ? = 10
  20. 20.16 + ? = 100
  21. 21.60 + ? = 100
  22. 22.6 + ? = 10
  23. 23.83 + ? = 100
  24. 24.40 + ? = 100
  25. 25.20 + ? = 100
  26. 26.62 + ? = 100
  27. 27.21 + ? = 100
  28. 28.42 + ? = 100
  29. 29.67 + ? = 100
  30. 30.29 + ? = 100
  31. 31.17 + ? = 100
  32. 32.53 + ? = 100
  33. 33.80 + ? = 100
  34. 34.64 + ? = 100
  35. 35.47 + ? = 100
  36. 36.37 + ? = 100
  37. 37.89 + ? = 100
  38. 38.27 + ? = 100
  39. 39.33 + ? = 100
  40. 40.66 + ? = 100

Answer key

  1. 2
  2. 23
  3. 16
  4. 8
  5. 55
  6. 62
  7. 7
  8. 12
  9. 85
  10. 6
  11. 50
  12. 5
  13. 24
  14. 1
  15. 3
  16. 68
  17. 42
  18. 59
  19. 9
  20. 84
  21. 40
  22. 4
  23. 17
  24. 60
  25. 80
  26. 38
  27. 79
  28. 58
  29. 33
  30. 71
  31. 83
  32. 47
  33. 20
  34. 36
  35. 53
  36. 63
  37. 11
  38. 73
  39. 67
  40. 34

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