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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 567 · 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. 1.49 + 14 =
  2. 2.52 + 26 =
  3. 3.89 + 63 =
  4. 4.74 + 31 =
  5. 5.60 + 63 =
  6. 6.68 + 18 =
  7. 7.84 + 12 =
  8. 8.51 + 14 =
  9. 9.80 + 57 =
  10. 10.41 + 72 =
  11. 11.59 + 25 =
  12. 12.26 + 76 =
  13. 13.50 + 88 =
  14. 14.77 + 31 =
  15. 15.40 + 21 =
  16. 16.78 + 65 =
  17. 17.27 + 48 =
  18. 18.81 + 34 =
  19. 19.60 + 21 =
  20. 20.24 + 27 =
  21. 21.25 + 61 =
  22. 22.21 + 54 =
  23. 23.30 + 41 =
  24. 24.89 + 41 =
  25. 25.54 + 22 =
  26. 26.32 + 73 =
  27. 27.22 + 84 =
  28. 28.46 + 69 =
  29. 29.41 + 22 =
  30. 30.25 + 38 =
  31. 31.48 + 22 =
  32. 32.74 + 18 =
  33. 33.72 + 43 =
  34. 34.32 + 16 =
  35. 35.30 + 25 =
  36. 36.73 + 33 =
  37. 37.80 + 23 =
  38. 38.35 + 32 =
  39. 39.33 + 66 =
  40. 40.50 + 49 =

Answer key

  1. 63
  2. 78
  3. 152
  4. 105
  5. 123
  6. 86
  7. 96
  8. 65
  9. 137
  10. 113
  11. 84
  12. 102
  13. 138
  14. 108
  15. 61
  16. 143
  17. 75
  18. 115
  19. 81
  20. 51
  21. 86
  22. 75
  23. 71
  24. 130
  25. 76
  26. 105
  27. 106
  28. 115
  29. 63
  30. 63
  31. 70
  32. 92
  33. 115
  34. 48
  35. 55
  36. 106
  37. 103
  38. 67
  39. 99
  40. 99

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