← 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 798 · 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. 1.50 + ? = 100
  2. 2.74 + ? = 100
  3. 3.73 + ? = 100
  4. 4.43 + ? = 100
  5. 5.4 + ? = 10
  6. 6.44 + ? = 100
  7. 7.24 + ? = 100
  8. 8.8 + ? = 10
  9. 9.69 + ? = 100
  10. 10.33 + ? = 100
  11. 11.81 + ? = 100
  12. 12.36 + ? = 100
  13. 13.85 + ? = 100
  14. 14.67 + ? = 100
  15. 15.1 + ? = 10
  16. 16.63 + ? = 100
  17. 17.61 + ? = 100
  18. 18.42 + ? = 100
  19. 19.68 + ? = 100
  20. 20.87 + ? = 100
  21. 21.15 + ? = 100
  22. 22.9 + ? = 10
  23. 23.3 + ? = 10
  24. 24.72 + ? = 100
  25. 25.13 + ? = 100
  26. 26.52 + ? = 100
  27. 27.20 + ? = 100
  28. 28.49 + ? = 100
  29. 29.48 + ? = 100
  30. 30.31 + ? = 100
  31. 31.46 + ? = 100
  32. 32.53 + ? = 100
  33. 33.71 + ? = 100
  34. 34.38 + ? = 100
  35. 35.6 + ? = 10
  36. 36.14 + ? = 100
  37. 37.28 + ? = 100
  38. 38.5 + ? = 10
  39. 39.19 + ? = 100
  40. 40.2 + ? = 10

Answer key

  1. 50
  2. 26
  3. 27
  4. 57
  5. 6
  6. 56
  7. 76
  8. 2
  9. 31
  10. 67
  11. 19
  12. 64
  13. 15
  14. 33
  15. 9
  16. 37
  17. 39
  18. 58
  19. 32
  20. 13
  21. 85
  22. 1
  23. 7
  24. 28
  25. 87
  26. 48
  27. 80
  28. 51
  29. 52
  30. 69
  31. 54
  32. 47
  33. 29
  34. 62
  35. 4
  36. 86
  37. 72
  38. 5
  39. 81
  40. 8

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