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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 332 · 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. 1.37 + 12 =
  2. 2.71 + 64 =
  3. 3.31 + 44 =
  4. 4.30 + 13 =
  5. 5.68 + 36 =
  6. 6.84 + 55 =
  7. 7.48 + 47 =
  8. 8.54 + 46 =
  9. 9.51 + 36 =
  10. 10.24 + 23 =
  11. 11.47 + 21 =
  12. 12.69 + 28 =
  13. 13.27 + 27 =
  14. 14.56 + 28 =
  15. 15.89 + 21 =
  16. 16.52 + 38 =
  17. 17.42 + 87 =
  18. 18.36 + 43 =
  19. 19.26 + 38 =
  20. 20.23 + 22 =
  21. 21.71 + 13 =
  22. 22.35 + 44 =
  23. 23.78 + 65 =
  24. 24.66 + 78 =
  25. 25.33 + 52 =
  26. 26.51 + 28 =
  27. 27.44 + 14 =
  28. 28.73 + 71 =
  29. 29.65 + 38 =
  30. 30.49 + 14 =
  31. 31.73 + 63 =
  32. 32.36 + 75 =
  33. 33.69 + 29 =
  34. 34.72 + 48 =
  35. 35.54 + 28 =
  36. 36.59 + 31 =
  37. 37.74 + 17 =
  38. 38.30 + 32 =
  39. 39.86 + 33 =
  40. 40.51 + 78 =

Answer key

  1. 49
  2. 135
  3. 75
  4. 43
  5. 104
  6. 139
  7. 95
  8. 100
  9. 87
  10. 47
  11. 68
  12. 97
  13. 54
  14. 84
  15. 110
  16. 90
  17. 129
  18. 79
  19. 64
  20. 45
  21. 84
  22. 79
  23. 143
  24. 144
  25. 85
  26. 79
  27. 58
  28. 144
  29. 103
  30. 63
  31. 136
  32. 111
  33. 98
  34. 120
  35. 82
  36. 90
  37. 91
  38. 62
  39. 119
  40. 129

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