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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 225 · 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. 1.40 + 28 =
  2. 2.61 + 39 =
  3. 3.29 + 51 =
  4. 4.29 + 33 =
  5. 5.24 + 81 =
  6. 6.57 + 18 =
  7. 7.74 + 15 =
  8. 8.78 + 42 =
  9. 9.41 + 73 =
  10. 10.29 + 89 =
  11. 11.86 + 69 =
  12. 12.82 + 19 =
  13. 13.67 + 36 =
  14. 14.29 + 77 =
  15. 15.50 + 41 =
  16. 16.46 + 21 =
  17. 17.36 + 28 =
  18. 18.34 + 52 =
  19. 19.61 + 63 =
  20. 20.56 + 58 =
  21. 21.50 + 72 =
  22. 22.27 + 85 =
  23. 23.42 + 55 =
  24. 24.74 + 19 =
  25. 25.89 + 51 =
  26. 26.65 + 66 =
  27. 27.74 + 23 =
  28. 28.36 + 21 =
  29. 29.65 + 41 =
  30. 30.58 + 28 =
  31. 31.49 + 68 =
  32. 32.42 + 13 =
  33. 33.79 + 55 =
  34. 34.75 + 33 =
  35. 35.73 + 72 =
  36. 36.52 + 89 =
  37. 37.53 + 15 =
  38. 38.53 + 72 =
  39. 39.68 + 86 =
  40. 40.75 + 82 =

Answer key

  1. 68
  2. 100
  3. 80
  4. 62
  5. 105
  6. 75
  7. 89
  8. 120
  9. 114
  10. 118
  11. 155
  12. 101
  13. 103
  14. 106
  15. 91
  16. 67
  17. 64
  18. 86
  19. 124
  20. 114
  21. 122
  22. 112
  23. 97
  24. 93
  25. 140
  26. 131
  27. 97
  28. 57
  29. 106
  30. 86
  31. 117
  32. 55
  33. 134
  34. 108
  35. 145
  36. 141
  37. 68
  38. 125
  39. 154
  40. 157

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