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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 85 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.38 + 51 =
  2. 2.64 + 49 =
  3. 3.75 + 13 =
  4. 4.32 + 21 =
  5. 5.55 + 81 =
  6. 6.51 + 78 =
  7. 7.36 + 25 =
  8. 8.26 + 46 =
  9. 9.43 + 77 =
  10. 10.67 + 72 =
  11. 11.30 + 82 =
  12. 12.51 + 21 =
  13. 13.52 + 51 =
  14. 14.50 + 15 =
  15. 15.31 + 42 =
  16. 16.29 + 19 =
  17. 17.37 + 27 =
  18. 18.86 + 12 =
  19. 19.39 + 43 =
  20. 20.30 + 65 =
  21. 21.56 + 38 =
  22. 22.39 + 19 =
  23. 23.55 + 57 =
  24. 24.51 + 42 =
  25. 25.65 + 59 =
  26. 26.82 + 41 =
  27. 27.54 + 38 =
  28. 28.87 + 72 =
  29. 29.54 + 76 =
  30. 30.55 + 39 =
  31. 31.30 + 32 =
  32. 32.40 + 88 =
  33. 33.84 + 23 =
  34. 34.52 + 68 =
  35. 35.86 + 66 =
  36. 36.78 + 85 =
  37. 37.30 + 43 =
  38. 38.27 + 65 =
  39. 39.29 + 26 =
  40. 40.78 + 51 =

Answer key

  1. 89
  2. 113
  3. 88
  4. 53
  5. 136
  6. 129
  7. 61
  8. 72
  9. 120
  10. 139
  11. 112
  12. 72
  13. 103
  14. 65
  15. 73
  16. 48
  17. 64
  18. 98
  19. 82
  20. 95
  21. 94
  22. 58
  23. 112
  24. 93
  25. 124
  26. 123
  27. 92
  28. 159
  29. 130
  30. 94
  31. 62
  32. 128
  33. 107
  34. 120
  35. 152
  36. 163
  37. 73
  38. 92
  39. 55
  40. 129

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