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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 793 · 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. 1.38 + 13 =
  2. 2.61 + 71 =
  3. 3.48 + 35 =
  4. 4.77 + 77 =
  5. 5.48 + 15 =
  6. 6.86 + 27 =
  7. 7.43 + 83 =
  8. 8.37 + 23 =
  9. 9.23 + 23 =
  10. 10.53 + 23 =
  11. 11.29 + 26 =
  12. 12.88 + 62 =
  13. 13.77 + 21 =
  14. 14.42 + 13 =
  15. 15.59 + 28 =
  16. 16.61 + 42 =
  17. 17.64 + 69 =
  18. 18.28 + 39 =
  19. 19.55 + 63 =
  20. 20.76 + 82 =
  21. 21.67 + 37 =
  22. 22.67 + 14 =
  23. 23.88 + 39 =
  24. 24.32 + 58 =
  25. 25.50 + 83 =
  26. 26.82 + 24 =
  27. 27.52 + 51 =
  28. 28.64 + 46 =
  29. 29.49 + 27 =
  30. 30.85 + 88 =
  31. 31.57 + 84 =
  32. 32.31 + 15 =
  33. 33.43 + 21 =
  34. 34.27 + 82 =
  35. 35.25 + 33 =
  36. 36.28 + 51 =
  37. 37.23 + 52 =
  38. 38.68 + 43 =
  39. 39.29 + 82 =
  40. 40.78 + 85 =

Answer key

  1. 51
  2. 132
  3. 83
  4. 154
  5. 63
  6. 113
  7. 126
  8. 60
  9. 46
  10. 76
  11. 55
  12. 150
  13. 98
  14. 55
  15. 87
  16. 103
  17. 133
  18. 67
  19. 118
  20. 158
  21. 104
  22. 81
  23. 127
  24. 90
  25. 133
  26. 106
  27. 103
  28. 110
  29. 76
  30. 173
  31. 141
  32. 46
  33. 64
  34. 109
  35. 58
  36. 79
  37. 75
  38. 111
  39. 111
  40. 163

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