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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 502 · 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 + 79 =
  2. 2.80 + 83 =
  3. 3.32 + 82 =
  4. 4.60 + 14 =
  5. 5.77 + 22 =
  6. 6.68 + 25 =
  7. 7.39 + 58 =
  8. 8.34 + 88 =
  9. 9.84 + 26 =
  10. 10.35 + 66 =
  11. 11.33 + 73 =
  12. 12.87 + 58 =
  13. 13.43 + 25 =
  14. 14.83 + 61 =
  15. 15.85 + 39 =
  16. 16.43 + 21 =
  17. 17.69 + 19 =
  18. 18.57 + 31 =
  19. 19.57 + 63 =
  20. 20.36 + 51 =
  21. 21.31 + 87 =
  22. 22.85 + 23 =
  23. 23.42 + 43 =
  24. 24.30 + 74 =
  25. 25.53 + 58 =
  26. 26.84 + 52 =
  27. 27.63 + 83 =
  28. 28.28 + 56 =
  29. 29.42 + 65 =
  30. 30.43 + 19 =
  31. 31.40 + 39 =
  32. 32.45 + 53 =
  33. 33.23 + 79 =
  34. 34.76 + 73 =
  35. 35.80 + 21 =
  36. 36.88 + 37 =
  37. 37.41 + 28 =
  38. 38.31 + 56 =
  39. 39.65 + 79 =
  40. 40.84 + 43 =

Answer key

  1. 119
  2. 163
  3. 114
  4. 74
  5. 99
  6. 93
  7. 97
  8. 122
  9. 110
  10. 101
  11. 106
  12. 145
  13. 68
  14. 144
  15. 124
  16. 64
  17. 88
  18. 88
  19. 120
  20. 87
  21. 118
  22. 108
  23. 85
  24. 104
  25. 111
  26. 136
  27. 146
  28. 84
  29. 107
  30. 62
  31. 79
  32. 98
  33. 102
  34. 149
  35. 101
  36. 125
  37. 69
  38. 87
  39. 144
  40. 127

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