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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 179 · 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 + 88 =
  2. 2.37 + 38 =
  3. 3.55 + 81 =
  4. 4.56 + 53 =
  5. 5.48 + 41 =
  6. 6.63 + 61 =
  7. 7.23 + 45 =
  8. 8.46 + 48 =
  9. 9.72 + 43 =
  10. 10.64 + 21 =
  11. 11.88 + 31 =
  12. 12.46 + 52 =
  13. 13.75 + 34 =
  14. 14.89 + 19 =
  15. 15.77 + 22 =
  16. 16.28 + 51 =
  17. 17.34 + 18 =
  18. 18.56 + 15 =
  19. 19.77 + 56 =
  20. 20.50 + 15 =
  21. 21.59 + 58 =
  22. 22.74 + 22 =
  23. 23.38 + 62 =
  24. 24.56 + 81 =
  25. 25.73 + 19 =
  26. 26.61 + 41 =
  27. 27.80 + 75 =
  28. 28.51 + 28 =
  29. 29.86 + 77 =
  30. 30.31 + 24 =
  31. 31.45 + 28 =
  32. 32.32 + 42 =
  33. 33.77 + 51 =
  34. 34.60 + 13 =
  35. 35.73 + 32 =
  36. 36.81 + 31 =
  37. 37.31 + 88 =
  38. 38.86 + 78 =
  39. 39.79 + 54 =
  40. 40.60 + 85 =

Answer key

  1. 126
  2. 75
  3. 136
  4. 109
  5. 89
  6. 124
  7. 68
  8. 94
  9. 115
  10. 85
  11. 119
  12. 98
  13. 109
  14. 108
  15. 99
  16. 79
  17. 52
  18. 71
  19. 133
  20. 65
  21. 117
  22. 96
  23. 100
  24. 137
  25. 92
  26. 102
  27. 155
  28. 79
  29. 163
  30. 55
  31. 73
  32. 74
  33. 128
  34. 73
  35. 105
  36. 112
  37. 119
  38. 164
  39. 133
  40. 145

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