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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 388 · 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. 1.85 + 68 =
  2. 2.59 + 88 =
  3. 3.24 + 19 =
  4. 4.39 + 24 =
  5. 5.27 + 56 =
  6. 6.38 + 43 =
  7. 7.58 + 81 =
  8. 8.50 + 48 =
  9. 9.56 + 37 =
  10. 10.22 + 88 =
  11. 11.65 + 57 =
  12. 12.85 + 82 =
  13. 13.53 + 44 =
  14. 14.89 + 81 =
  15. 15.65 + 14 =
  16. 16.89 + 85 =
  17. 17.86 + 77 =
  18. 18.69 + 27 =
  19. 19.63 + 81 =
  20. 20.62 + 75 =
  21. 21.72 + 26 =
  22. 22.31 + 27 =
  23. 23.28 + 15 =
  24. 24.89 + 33 =
  25. 25.24 + 83 =
  26. 26.29 + 13 =
  27. 27.48 + 18 =
  28. 28.63 + 53 =
  29. 29.84 + 16 =
  30. 30.75 + 87 =
  31. 31.72 + 16 =
  32. 32.60 + 56 =
  33. 33.45 + 48 =
  34. 34.56 + 21 =
  35. 35.32 + 72 =
  36. 36.83 + 49 =
  37. 37.30 + 37 =
  38. 38.25 + 33 =
  39. 39.29 + 37 =
  40. 40.33 + 51 =

Answer key

  1. 153
  2. 147
  3. 43
  4. 63
  5. 83
  6. 81
  7. 139
  8. 98
  9. 93
  10. 110
  11. 122
  12. 167
  13. 97
  14. 170
  15. 79
  16. 174
  17. 163
  18. 96
  19. 144
  20. 137
  21. 98
  22. 58
  23. 43
  24. 122
  25. 107
  26. 42
  27. 66
  28. 116
  29. 100
  30. 162
  31. 88
  32. 116
  33. 93
  34. 77
  35. 104
  36. 132
  37. 67
  38. 58
  39. 66
  40. 84

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