← 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 851 · 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. 1.62 + ? = 100
  2. 2.50 + ? = 100
  3. 3.61 + ? = 100
  4. 4.11 + ? = 100
  5. 5.23 + ? = 100
  6. 6.29 + ? = 100
  7. 7.19 + ? = 100
  8. 8.48 + ? = 100
  9. 9.51 + ? = 100
  10. 10.37 + ? = 100
  11. 11.73 + ? = 100
  12. 12.76 + ? = 100
  13. 13.3 + ? = 10
  14. 14.9 + ? = 10
  15. 15.7 + ? = 10
  16. 16.88 + ? = 100
  17. 17.49 + ? = 100
  18. 18.74 + ? = 100
  19. 19.12 + ? = 100
  20. 20.42 + ? = 100
  21. 21.68 + ? = 100
  22. 22.64 + ? = 100
  23. 23.43 + ? = 100
  24. 24.4 + ? = 10
  25. 25.8 + ? = 10
  26. 26.2 + ? = 10
  27. 27.67 + ? = 100
  28. 28.5 + ? = 10
  29. 29.84 + ? = 100
  30. 30.56 + ? = 100
  31. 31.77 + ? = 100
  32. 32.28 + ? = 100
  33. 33.79 + ? = 100
  34. 34.82 + ? = 100
  35. 35.1 + ? = 10
  36. 36.20 + ? = 100
  37. 37.6 + ? = 10
  38. 38.16 + ? = 100
  39. 39.87 + ? = 100
  40. 40.46 + ? = 100

Answer key

  1. 38
  2. 50
  3. 39
  4. 89
  5. 77
  6. 71
  7. 81
  8. 52
  9. 49
  10. 63
  11. 27
  12. 24
  13. 7
  14. 1
  15. 3
  16. 12
  17. 51
  18. 26
  19. 88
  20. 58
  21. 32
  22. 36
  23. 57
  24. 6
  25. 2
  26. 8
  27. 33
  28. 5
  29. 16
  30. 44
  31. 23
  32. 72
  33. 21
  34. 18
  35. 9
  36. 80
  37. 4
  38. 84
  39. 13
  40. 54

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