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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 164 · 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. 1.34 + 38 =
  2. 2.30 + 36 =
  3. 3.60 + 25 =
  4. 4.81 + 31 =
  5. 5.28 + 12 =
  6. 6.64 + 64 =
  7. 7.30 + 73 =
  8. 8.40 + 33 =
  9. 9.40 + 64 =
  10. 10.24 + 87 =
  11. 11.24 + 86 =
  12. 12.37 + 48 =
  13. 13.55 + 76 =
  14. 14.77 + 85 =
  15. 15.26 + 25 =
  16. 16.44 + 31 =
  17. 17.43 + 78 =
  18. 18.79 + 51 =
  19. 19.85 + 51 =
  20. 20.68 + 18 =
  21. 21.53 + 17 =
  22. 22.68 + 41 =
  23. 23.23 + 45 =
  24. 24.33 + 72 =
  25. 25.50 + 59 =
  26. 26.25 + 61 =
  27. 27.65 + 75 =
  28. 28.65 + 43 =
  29. 29.35 + 58 =
  30. 30.47 + 24 =
  31. 31.74 + 31 =
  32. 32.53 + 57 =
  33. 33.51 + 22 =
  34. 34.74 + 28 =
  35. 35.27 + 22 =
  36. 36.32 + 42 =
  37. 37.76 + 74 =
  38. 38.64 + 84 =
  39. 39.48 + 24 =
  40. 40.61 + 84 =

Answer key

  1. 72
  2. 66
  3. 85
  4. 112
  5. 40
  6. 128
  7. 103
  8. 73
  9. 104
  10. 111
  11. 110
  12. 85
  13. 131
  14. 162
  15. 51
  16. 75
  17. 121
  18. 130
  19. 136
  20. 86
  21. 70
  22. 109
  23. 68
  24. 105
  25. 109
  26. 86
  27. 140
  28. 108
  29. 93
  30. 71
  31. 105
  32. 110
  33. 73
  34. 102
  35. 49
  36. 74
  37. 150
  38. 148
  39. 72
  40. 145

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