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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 93 · 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. 1.24 + 75 =
  2. 2.33 + 16 =
  3. 3.87 + 57 =
  4. 4.55 + 26 =
  5. 5.23 + 44 =
  6. 6.37 + 41 =
  7. 7.74 + 31 =
  8. 8.26 + 35 =
  9. 9.28 + 51 =
  10. 10.39 + 43 =
  11. 11.40 + 24 =
  12. 12.89 + 75 =
  13. 13.65 + 33 =
  14. 14.41 + 65 =
  15. 15.56 + 62 =
  16. 16.58 + 44 =
  17. 17.36 + 71 =
  18. 18.67 + 21 =
  19. 19.65 + 25 =
  20. 20.35 + 74 =
  21. 21.22 + 22 =
  22. 22.54 + 25 =
  23. 23.49 + 45 =
  24. 24.46 + 87 =
  25. 25.42 + 16 =
  26. 26.60 + 34 =
  27. 27.73 + 63 =
  28. 28.42 + 17 =
  29. 29.83 + 24 =
  30. 30.46 + 61 =
  31. 31.33 + 23 =
  32. 32.34 + 29 =
  33. 33.41 + 15 =
  34. 34.60 + 14 =
  35. 35.24 + 57 =
  36. 36.61 + 19 =
  37. 37.61 + 14 =
  38. 38.64 + 71 =
  39. 39.67 + 87 =
  40. 40.62 + 22 =

Answer key

  1. 99
  2. 49
  3. 144
  4. 81
  5. 67
  6. 78
  7. 105
  8. 61
  9. 79
  10. 82
  11. 64
  12. 164
  13. 98
  14. 106
  15. 118
  16. 102
  17. 107
  18. 88
  19. 90
  20. 109
  21. 44
  22. 79
  23. 94
  24. 133
  25. 58
  26. 94
  27. 136
  28. 59
  29. 107
  30. 107
  31. 56
  32. 63
  33. 56
  34. 74
  35. 81
  36. 80
  37. 75
  38. 135
  39. 154
  40. 84

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