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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 170 · 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. 1.83 + 35 =
  2. 2.64 + 46 =
  3. 3.64 + 37 =
  4. 4.47 + 55 =
  5. 5.81 + 63 =
  6. 6.48 + 77 =
  7. 7.26 + 83 =
  8. 8.78 + 77 =
  9. 9.37 + 85 =
  10. 10.62 + 51 =
  11. 11.29 + 31 =
  12. 12.53 + 83 =
  13. 13.75 + 34 =
  14. 14.80 + 16 =
  15. 15.88 + 39 =
  16. 16.38 + 61 =
  17. 17.28 + 13 =
  18. 18.85 + 68 =
  19. 19.67 + 83 =
  20. 20.33 + 64 =
  21. 21.39 + 18 =
  22. 22.55 + 74 =
  23. 23.58 + 25 =
  24. 24.30 + 27 =
  25. 25.73 + 12 =
  26. 26.54 + 32 =
  27. 27.41 + 25 =
  28. 28.33 + 66 =
  29. 29.64 + 19 =
  30. 30.72 + 48 =
  31. 31.59 + 87 =
  32. 32.23 + 33 =
  33. 33.52 + 25 =
  34. 34.82 + 21 =
  35. 35.80 + 28 =
  36. 36.34 + 58 =
  37. 37.78 + 12 =
  38. 38.67 + 41 =
  39. 39.31 + 28 =
  40. 40.84 + 87 =

Answer key

  1. 118
  2. 110
  3. 101
  4. 102
  5. 144
  6. 125
  7. 109
  8. 155
  9. 122
  10. 113
  11. 60
  12. 136
  13. 109
  14. 96
  15. 127
  16. 99
  17. 41
  18. 153
  19. 150
  20. 97
  21. 57
  22. 129
  23. 83
  24. 57
  25. 85
  26. 86
  27. 66
  28. 99
  29. 83
  30. 120
  31. 146
  32. 56
  33. 77
  34. 103
  35. 108
  36. 92
  37. 90
  38. 108
  39. 59
  40. 171

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