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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 528 · 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. 1.35 + 43 =
  2. 2.28 + 55 =
  3. 3.27 + 21 =
  4. 4.80 + 84 =
  5. 5.44 + 39 =
  6. 6.89 + 34 =
  7. 7.69 + 58 =
  8. 8.37 + 36 =
  9. 9.57 + 64 =
  10. 10.29 + 74 =
  11. 11.55 + 65 =
  12. 12.58 + 81 =
  13. 13.37 + 34 =
  14. 14.21 + 57 =
  15. 15.85 + 48 =
  16. 16.66 + 45 =
  17. 17.67 + 56 =
  18. 18.79 + 76 =
  19. 19.46 + 81 =
  20. 20.36 + 13 =
  21. 21.21 + 59 =
  22. 22.63 + 19 =
  23. 23.76 + 84 =
  24. 24.33 + 42 =
  25. 25.31 + 77 =
  26. 26.44 + 13 =
  27. 27.43 + 54 =
  28. 28.22 + 27 =
  29. 29.67 + 57 =
  30. 30.24 + 41 =
  31. 31.65 + 56 =
  32. 32.84 + 85 =
  33. 33.31 + 66 =
  34. 34.32 + 17 =
  35. 35.36 + 19 =
  36. 36.36 + 42 =
  37. 37.80 + 41 =
  38. 38.68 + 71 =
  39. 39.80 + 57 =
  40. 40.79 + 87 =

Answer key

  1. 78
  2. 83
  3. 48
  4. 164
  5. 83
  6. 123
  7. 127
  8. 73
  9. 121
  10. 103
  11. 120
  12. 139
  13. 71
  14. 78
  15. 133
  16. 111
  17. 123
  18. 155
  19. 127
  20. 49
  21. 80
  22. 82
  23. 160
  24. 75
  25. 108
  26. 57
  27. 97
  28. 49
  29. 124
  30. 65
  31. 121
  32. 169
  33. 97
  34. 49
  35. 55
  36. 78
  37. 121
  38. 139
  39. 137
  40. 166

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