← 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 983 · 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. 1.3 + ? = 10
  2. 2.5 + ? = 10
  3. 3.9 + ? = 10
  4. 4.1 + ? = 10
  5. 5.32 + ? = 100
  6. 6.31 + ? = 100
  7. 7.44 + ? = 100
  8. 8.4 + ? = 10
  9. 9.19 + ? = 100
  10. 10.7 + ? = 10
  11. 11.40 + ? = 100
  12. 12.2 + ? = 10
  13. 13.86 + ? = 100
  14. 14.53 + ? = 100
  15. 15.15 + ? = 100
  16. 16.24 + ? = 100
  17. 17.55 + ? = 100
  18. 18.29 + ? = 100
  19. 19.23 + ? = 100
  20. 20.67 + ? = 100
  21. 21.51 + ? = 100
  22. 22.6 + ? = 10
  23. 23.60 + ? = 100
  24. 24.63 + ? = 100
  25. 25.28 + ? = 100
  26. 26.65 + ? = 100
  27. 27.26 + ? = 100
  28. 28.88 + ? = 100
  29. 29.72 + ? = 100
  30. 30.48 + ? = 100
  31. 31.8 + ? = 10
  32. 32.49 + ? = 100
  33. 33.30 + ? = 100
  34. 34.14 + ? = 100
  35. 35.46 + ? = 100
  36. 36.20 + ? = 100
  37. 37.66 + ? = 100
  38. 38.85 + ? = 100
  39. 39.61 + ? = 100
  40. 40.50 + ? = 100

Answer key

  1. 7
  2. 5
  3. 1
  4. 9
  5. 68
  6. 69
  7. 56
  8. 6
  9. 81
  10. 3
  11. 60
  12. 8
  13. 14
  14. 47
  15. 85
  16. 76
  17. 45
  18. 71
  19. 77
  20. 33
  21. 49
  22. 4
  23. 40
  24. 37
  25. 72
  26. 35
  27. 74
  28. 12
  29. 28
  30. 52
  31. 2
  32. 51
  33. 70
  34. 86
  35. 54
  36. 80
  37. 34
  38. 15
  39. 39
  40. 50

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