← 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 638 · 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. 1.52 + ? = 100
  2. 2.16 + ? = 100
  3. 3.7 + ? = 10
  4. 4.4 + ? = 10
  5. 5.85 + ? = 100
  6. 6.32 + ? = 100
  7. 7.65 + ? = 100
  8. 8.3 + ? = 10
  9. 9.1 + ? = 10
  10. 10.6 + ? = 10
  11. 11.35 + ? = 100
  12. 12.9 + ? = 10
  13. 13.86 + ? = 100
  14. 14.77 + ? = 100
  15. 15.50 + ? = 100
  16. 16.54 + ? = 100
  17. 17.30 + ? = 100
  18. 18.2 + ? = 10
  19. 19.13 + ? = 100
  20. 20.53 + ? = 100
  21. 21.31 + ? = 100
  22. 22.5 + ? = 10
  23. 23.29 + ? = 100
  24. 24.8 + ? = 10
  25. 25.72 + ? = 100
  26. 26.78 + ? = 100
  27. 27.49 + ? = 100
  28. 28.67 + ? = 100
  29. 29.19 + ? = 100
  30. 30.46 + ? = 100
  31. 31.34 + ? = 100
  32. 32.62 + ? = 100
  33. 33.82 + ? = 100
  34. 34.56 + ? = 100
  35. 35.21 + ? = 100
  36. 36.88 + ? = 100
  37. 37.22 + ? = 100
  38. 38.58 + ? = 100
  39. 39.70 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 48
  2. 84
  3. 3
  4. 6
  5. 15
  6. 68
  7. 35
  8. 7
  9. 9
  10. 4
  11. 65
  12. 1
  13. 14
  14. 23
  15. 50
  16. 46
  17. 70
  18. 8
  19. 87
  20. 47
  21. 69
  22. 5
  23. 71
  24. 2
  25. 28
  26. 22
  27. 51
  28. 33
  29. 81
  30. 54
  31. 66
  32. 38
  33. 18
  34. 44
  35. 79
  36. 12
  37. 78
  38. 42
  39. 30
  40. 88

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