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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 262 · 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. 1.62 + 68 =
  2. 2.38 + 66 =
  3. 3.30 + 74 =
  4. 4.53 + 51 =
  5. 5.30 + 76 =
  6. 6.28 + 72 =
  7. 7.51 + 58 =
  8. 8.84 + 38 =
  9. 9.33 + 28 =
  10. 10.78 + 48 =
  11. 11.24 + 52 =
  12. 12.88 + 81 =
  13. 13.46 + 81 =
  14. 14.68 + 81 =
  15. 15.78 + 27 =
  16. 16.61 + 44 =
  17. 17.67 + 18 =
  18. 18.23 + 36 =
  19. 19.34 + 13 =
  20. 20.44 + 25 =
  21. 21.68 + 74 =
  22. 22.70 + 81 =
  23. 23.57 + 16 =
  24. 24.71 + 14 =
  25. 25.83 + 49 =
  26. 26.31 + 71 =
  27. 27.59 + 88 =
  28. 28.50 + 51 =
  29. 29.68 + 31 =
  30. 30.89 + 53 =
  31. 31.73 + 59 =
  32. 32.62 + 89 =
  33. 33.30 + 87 =
  34. 34.79 + 32 =
  35. 35.70 + 43 =
  36. 36.76 + 29 =
  37. 37.67 + 32 =
  38. 38.49 + 41 =
  39. 39.46 + 29 =
  40. 40.49 + 69 =

Answer key

  1. 130
  2. 104
  3. 104
  4. 104
  5. 106
  6. 100
  7. 109
  8. 122
  9. 61
  10. 126
  11. 76
  12. 169
  13. 127
  14. 149
  15. 105
  16. 105
  17. 85
  18. 59
  19. 47
  20. 69
  21. 142
  22. 151
  23. 73
  24. 85
  25. 132
  26. 102
  27. 147
  28. 101
  29. 99
  30. 142
  31. 132
  32. 151
  33. 117
  34. 111
  35. 113
  36. 105
  37. 99
  38. 90
  39. 75
  40. 118

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