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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 385 · 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. 1.41 + 31 =
  2. 2.77 + 41 =
  3. 3.79 + 34 =
  4. 4.45 + 59 =
  5. 5.42 + 18 =
  6. 6.78 + 25 =
  7. 7.32 + 65 =
  8. 8.67 + 78 =
  9. 9.86 + 55 =
  10. 10.52 + 65 =
  11. 11.56 + 49 =
  12. 12.63 + 53 =
  13. 13.40 + 46 =
  14. 14.40 + 24 =
  15. 15.52 + 88 =
  16. 16.45 + 58 =
  17. 17.63 + 39 =
  18. 18.65 + 27 =
  19. 19.74 + 31 =
  20. 20.41 + 61 =
  21. 21.55 + 17 =
  22. 22.76 + 28 =
  23. 23.45 + 41 =
  24. 24.75 + 13 =
  25. 25.57 + 85 =
  26. 26.24 + 89 =
  27. 27.77 + 84 =
  28. 28.40 + 78 =
  29. 29.22 + 18 =
  30. 30.77 + 33 =
  31. 31.68 + 87 =
  32. 32.33 + 25 =
  33. 33.53 + 75 =
  34. 34.77 + 23 =
  35. 35.42 + 79 =
  36. 36.74 + 19 =
  37. 37.46 + 12 =
  38. 38.42 + 54 =
  39. 39.50 + 53 =
  40. 40.56 + 78 =

Answer key

  1. 72
  2. 118
  3. 113
  4. 104
  5. 60
  6. 103
  7. 97
  8. 145
  9. 141
  10. 117
  11. 105
  12. 116
  13. 86
  14. 64
  15. 140
  16. 103
  17. 102
  18. 92
  19. 105
  20. 102
  21. 72
  22. 104
  23. 86
  24. 88
  25. 142
  26. 113
  27. 161
  28. 118
  29. 40
  30. 110
  31. 155
  32. 58
  33. 128
  34. 100
  35. 121
  36. 93
  37. 58
  38. 96
  39. 103
  40. 134

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