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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 427 · 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. 1.58 + 26 =
  2. 2.49 + 78 =
  3. 3.82 + 45 =
  4. 4.40 + 45 =
  5. 5.57 + 34 =
  6. 6.63 + 44 =
  7. 7.85 + 81 =
  8. 8.35 + 61 =
  9. 9.27 + 55 =
  10. 10.79 + 52 =
  11. 11.44 + 83 =
  12. 12.57 + 62 =
  13. 13.61 + 59 =
  14. 14.48 + 52 =
  15. 15.49 + 35 =
  16. 16.39 + 16 =
  17. 17.56 + 41 =
  18. 18.89 + 85 =
  19. 19.47 + 34 =
  20. 20.75 + 38 =
  21. 21.60 + 51 =
  22. 22.47 + 24 =
  23. 23.23 + 49 =
  24. 24.46 + 36 =
  25. 25.36 + 85 =
  26. 26.27 + 85 =
  27. 27.39 + 81 =
  28. 28.28 + 53 =
  29. 29.40 + 38 =
  30. 30.28 + 45 =
  31. 31.22 + 73 =
  32. 32.79 + 79 =
  33. 33.44 + 86 =
  34. 34.48 + 27 =
  35. 35.60 + 32 =
  36. 36.57 + 48 =
  37. 37.21 + 38 =
  38. 38.53 + 47 =
  39. 39.26 + 67 =
  40. 40.46 + 47 =

Answer key

  1. 84
  2. 127
  3. 127
  4. 85
  5. 91
  6. 107
  7. 166
  8. 96
  9. 82
  10. 131
  11. 127
  12. 119
  13. 120
  14. 100
  15. 84
  16. 55
  17. 97
  18. 174
  19. 81
  20. 113
  21. 111
  22. 71
  23. 72
  24. 82
  25. 121
  26. 112
  27. 120
  28. 81
  29. 78
  30. 73
  31. 95
  32. 158
  33. 130
  34. 75
  35. 92
  36. 105
  37. 59
  38. 100
  39. 93
  40. 93

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