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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 331 · 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. 1.86 + 63 =
  2. 2.40 + 67 =
  3. 3.80 + 61 =
  4. 4.26 + 88 =
  5. 5.55 + 14 =
  6. 6.65 + 21 =
  7. 7.67 + 53 =
  8. 8.39 + 73 =
  9. 9.31 + 32 =
  10. 10.49 + 19 =
  11. 11.31 + 31 =
  12. 12.81 + 53 =
  13. 13.68 + 45 =
  14. 14.74 + 38 =
  15. 15.75 + 42 =
  16. 16.27 + 57 =
  17. 17.80 + 73 =
  18. 18.77 + 82 =
  19. 19.25 + 71 =
  20. 20.40 + 41 =
  21. 21.78 + 64 =
  22. 22.52 + 46 =
  23. 23.74 + 76 =
  24. 24.31 + 33 =
  25. 25.28 + 35 =
  26. 26.67 + 28 =
  27. 27.89 + 75 =
  28. 28.33 + 24 =
  29. 29.38 + 28 =
  30. 30.87 + 87 =
  31. 31.44 + 55 =
  32. 32.70 + 71 =
  33. 33.85 + 55 =
  34. 34.40 + 44 =
  35. 35.80 + 18 =
  36. 36.37 + 33 =
  37. 37.37 + 21 =
  38. 38.34 + 58 =
  39. 39.24 + 39 =
  40. 40.51 + 38 =

Answer key

  1. 149
  2. 107
  3. 141
  4. 114
  5. 69
  6. 86
  7. 120
  8. 112
  9. 63
  10. 68
  11. 62
  12. 134
  13. 113
  14. 112
  15. 117
  16. 84
  17. 153
  18. 159
  19. 96
  20. 81
  21. 142
  22. 98
  23. 150
  24. 64
  25. 63
  26. 95
  27. 164
  28. 57
  29. 66
  30. 174
  31. 99
  32. 141
  33. 140
  34. 84
  35. 98
  36. 70
  37. 58
  38. 92
  39. 63
  40. 89

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