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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 70 · 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. 1.44 + 61 =
  2. 2.71 + 29 =
  3. 3.73 + 57 =
  4. 4.61 + 71 =
  5. 5.36 + 63 =
  6. 6.64 + 16 =
  7. 7.23 + 61 =
  8. 8.22 + 34 =
  9. 9.27 + 81 =
  10. 10.50 + 61 =
  11. 11.53 + 51 =
  12. 12.56 + 48 =
  13. 13.30 + 14 =
  14. 14.36 + 39 =
  15. 15.33 + 71 =
  16. 16.39 + 13 =
  17. 17.53 + 15 =
  18. 18.77 + 66 =
  19. 19.43 + 58 =
  20. 20.23 + 39 =
  21. 21.48 + 31 =
  22. 22.64 + 38 =
  23. 23.78 + 83 =
  24. 24.25 + 59 =
  25. 25.36 + 34 =
  26. 26.78 + 67 =
  27. 27.63 + 84 =
  28. 28.54 + 46 =
  29. 29.77 + 81 =
  30. 30.33 + 48 =
  31. 31.74 + 53 =
  32. 32.63 + 19 =
  33. 33.80 + 89 =
  34. 34.37 + 57 =
  35. 35.79 + 15 =
  36. 36.28 + 19 =
  37. 37.26 + 26 =
  38. 38.72 + 36 =
  39. 39.73 + 72 =
  40. 40.31 + 65 =

Answer key

  1. 105
  2. 100
  3. 130
  4. 132
  5. 99
  6. 80
  7. 84
  8. 56
  9. 108
  10. 111
  11. 104
  12. 104
  13. 44
  14. 75
  15. 104
  16. 52
  17. 68
  18. 143
  19. 101
  20. 62
  21. 79
  22. 102
  23. 161
  24. 84
  25. 70
  26. 145
  27. 147
  28. 100
  29. 158
  30. 81
  31. 127
  32. 82
  33. 169
  34. 94
  35. 94
  36. 47
  37. 52
  38. 108
  39. 145
  40. 96

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