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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 443 · 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. 1.66 + 84 =
  2. 2.38 + 22 =
  3. 3.58 + 87 =
  4. 4.45 + 68 =
  5. 5.76 + 51 =
  6. 6.84 + 29 =
  7. 7.77 + 19 =
  8. 8.26 + 79 =
  9. 9.72 + 18 =
  10. 10.42 + 21 =
  11. 11.42 + 26 =
  12. 12.22 + 66 =
  13. 13.38 + 18 =
  14. 14.72 + 81 =
  15. 15.40 + 58 =
  16. 16.55 + 69 =
  17. 17.43 + 51 =
  18. 18.35 + 21 =
  19. 19.28 + 88 =
  20. 20.60 + 77 =
  21. 21.88 + 65 =
  22. 22.57 + 58 =
  23. 23.37 + 53 =
  24. 24.73 + 31 =
  25. 25.48 + 32 =
  26. 26.21 + 59 =
  27. 27.27 + 54 =
  28. 28.73 + 27 =
  29. 29.42 + 29 =
  30. 30.81 + 81 =
  31. 31.83 + 41 =
  32. 32.42 + 88 =
  33. 33.56 + 41 =
  34. 34.25 + 56 =
  35. 35.44 + 49 =
  36. 36.51 + 83 =
  37. 37.87 + 44 =
  38. 38.79 + 49 =
  39. 39.46 + 74 =
  40. 40.81 + 28 =

Answer key

  1. 150
  2. 60
  3. 145
  4. 113
  5. 127
  6. 113
  7. 96
  8. 105
  9. 90
  10. 63
  11. 68
  12. 88
  13. 56
  14. 153
  15. 98
  16. 124
  17. 94
  18. 56
  19. 116
  20. 137
  21. 153
  22. 115
  23. 90
  24. 104
  25. 80
  26. 80
  27. 81
  28. 100
  29. 71
  30. 162
  31. 124
  32. 130
  33. 97
  34. 81
  35. 93
  36. 134
  37. 131
  38. 128
  39. 120
  40. 109

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