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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 515 · 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. 1.33 + 43 =
  2. 2.43 + 56 =
  3. 3.36 + 24 =
  4. 4.41 + 15 =
  5. 5.43 + 23 =
  6. 6.39 + 32 =
  7. 7.55 + 17 =
  8. 8.30 + 16 =
  9. 9.26 + 27 =
  10. 10.28 + 73 =
  11. 11.68 + 44 =
  12. 12.48 + 21 =
  13. 13.40 + 45 =
  14. 14.24 + 89 =
  15. 15.72 + 66 =
  16. 16.80 + 46 =
  17. 17.38 + 65 =
  18. 18.33 + 86 =
  19. 19.80 + 36 =
  20. 20.59 + 71 =
  21. 21.84 + 17 =
  22. 22.46 + 73 =
  23. 23.32 + 35 =
  24. 24.50 + 48 =
  25. 25.52 + 73 =
  26. 26.22 + 31 =
  27. 27.69 + 81 =
  28. 28.41 + 72 =
  29. 29.52 + 42 =
  30. 30.62 + 73 =
  31. 31.81 + 61 =
  32. 32.44 + 63 =
  33. 33.24 + 79 =
  34. 34.70 + 27 =
  35. 35.53 + 13 =
  36. 36.85 + 32 =
  37. 37.82 + 72 =
  38. 38.63 + 29 =
  39. 39.33 + 55 =
  40. 40.69 + 13 =

Answer key

  1. 76
  2. 99
  3. 60
  4. 56
  5. 66
  6. 71
  7. 72
  8. 46
  9. 53
  10. 101
  11. 112
  12. 69
  13. 85
  14. 113
  15. 138
  16. 126
  17. 103
  18. 119
  19. 116
  20. 130
  21. 101
  22. 119
  23. 67
  24. 98
  25. 125
  26. 53
  27. 150
  28. 113
  29. 94
  30. 135
  31. 142
  32. 107
  33. 103
  34. 97
  35. 66
  36. 117
  37. 154
  38. 92
  39. 88
  40. 82

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