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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 220 · 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. 1.42 + 29 =
  2. 2.35 + 27 =
  3. 3.40 + 51 =
  4. 4.45 + 23 =
  5. 5.86 + 36 =
  6. 6.60 + 22 =
  7. 7.64 + 12 =
  8. 8.41 + 33 =
  9. 9.31 + 25 =
  10. 10.45 + 78 =
  11. 11.83 + 86 =
  12. 12.83 + 44 =
  13. 13.48 + 53 =
  14. 14.59 + 78 =
  15. 15.32 + 28 =
  16. 16.45 + 46 =
  17. 17.25 + 73 =
  18. 18.31 + 28 =
  19. 19.48 + 77 =
  20. 20.81 + 56 =
  21. 21.28 + 46 =
  22. 22.33 + 59 =
  23. 23.67 + 25 =
  24. 24.30 + 26 =
  25. 25.77 + 13 =
  26. 26.83 + 25 =
  27. 27.84 + 48 =
  28. 28.70 + 21 =
  29. 29.76 + 15 =
  30. 30.44 + 54 =
  31. 31.50 + 21 =
  32. 32.67 + 81 =
  33. 33.67 + 35 =
  34. 34.55 + 73 =
  35. 35.68 + 85 =
  36. 36.50 + 67 =
  37. 37.28 + 49 =
  38. 38.26 + 21 =
  39. 39.51 + 71 =
  40. 40.85 + 69 =

Answer key

  1. 71
  2. 62
  3. 91
  4. 68
  5. 122
  6. 82
  7. 76
  8. 74
  9. 56
  10. 123
  11. 169
  12. 127
  13. 101
  14. 137
  15. 60
  16. 91
  17. 98
  18. 59
  19. 125
  20. 137
  21. 74
  22. 92
  23. 92
  24. 56
  25. 90
  26. 108
  27. 132
  28. 91
  29. 91
  30. 98
  31. 71
  32. 148
  33. 102
  34. 128
  35. 153
  36. 117
  37. 77
  38. 47
  39. 122
  40. 154

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