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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 500 · 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. 1.26 + 17 =
  2. 2.31 + 15 =
  3. 3.41 + 44 =
  4. 4.72 + 49 =
  5. 5.51 + 52 =
  6. 6.42 + 83 =
  7. 7.64 + 17 =
  8. 8.89 + 87 =
  9. 9.30 + 74 =
  10. 10.52 + 28 =
  11. 11.50 + 31 =
  12. 12.62 + 33 =
  13. 13.31 + 73 =
  14. 14.82 + 65 =
  15. 15.67 + 35 =
  16. 16.83 + 51 =
  17. 17.61 + 46 =
  18. 18.53 + 31 =
  19. 19.33 + 54 =
  20. 20.63 + 65 =
  21. 21.64 + 43 =
  22. 22.28 + 31 =
  23. 23.60 + 64 =
  24. 24.56 + 13 =
  25. 25.86 + 39 =
  26. 26.73 + 24 =
  27. 27.34 + 71 =
  28. 28.72 + 73 =
  29. 29.38 + 35 =
  30. 30.33 + 26 =
  31. 31.56 + 51 =
  32. 32.42 + 75 =
  33. 33.24 + 61 =
  34. 34.42 + 84 =
  35. 35.88 + 13 =
  36. 36.21 + 49 =
  37. 37.30 + 42 =
  38. 38.89 + 21 =
  39. 39.58 + 83 =
  40. 40.29 + 51 =

Answer key

  1. 43
  2. 46
  3. 85
  4. 121
  5. 103
  6. 125
  7. 81
  8. 176
  9. 104
  10. 80
  11. 81
  12. 95
  13. 104
  14. 147
  15. 102
  16. 134
  17. 107
  18. 84
  19. 87
  20. 128
  21. 107
  22. 59
  23. 124
  24. 69
  25. 125
  26. 97
  27. 105
  28. 145
  29. 73
  30. 59
  31. 107
  32. 117
  33. 85
  34. 126
  35. 101
  36. 70
  37. 72
  38. 110
  39. 141
  40. 80

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