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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 581 · 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. 1.43 + 34 =
  2. 2.50 + 75 =
  3. 3.31 + 83 =
  4. 4.52 + 53 =
  5. 5.46 + 61 =
  6. 6.29 + 86 =
  7. 7.32 + 16 =
  8. 8.65 + 63 =
  9. 9.78 + 32 =
  10. 10.36 + 12 =
  11. 11.54 + 72 =
  12. 12.30 + 78 =
  13. 13.82 + 33 =
  14. 14.86 + 79 =
  15. 15.36 + 35 =
  16. 16.31 + 35 =
  17. 17.35 + 33 =
  18. 18.80 + 72 =
  19. 19.39 + 52 =
  20. 20.22 + 32 =
  21. 21.79 + 25 =
  22. 22.57 + 31 =
  23. 23.56 + 26 =
  24. 24.57 + 22 =
  25. 25.53 + 33 =
  26. 26.23 + 48 =
  27. 27.23 + 28 =
  28. 28.24 + 44 =
  29. 29.81 + 39 =
  30. 30.21 + 41 =
  31. 31.50 + 61 =
  32. 32.70 + 13 =
  33. 33.27 + 61 =
  34. 34.48 + 84 =
  35. 35.59 + 57 =
  36. 36.89 + 16 =
  37. 37.79 + 69 =
  38. 38.64 + 64 =
  39. 39.39 + 57 =
  40. 40.43 + 45 =

Answer key

  1. 77
  2. 125
  3. 114
  4. 105
  5. 107
  6. 115
  7. 48
  8. 128
  9. 110
  10. 48
  11. 126
  12. 108
  13. 115
  14. 165
  15. 71
  16. 66
  17. 68
  18. 152
  19. 91
  20. 54
  21. 104
  22. 88
  23. 82
  24. 79
  25. 86
  26. 71
  27. 51
  28. 68
  29. 120
  30. 62
  31. 111
  32. 83
  33. 88
  34. 132
  35. 116
  36. 105
  37. 148
  38. 128
  39. 96
  40. 88

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