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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 264 · 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. 1.44 + 81 =
  2. 2.34 + 82 =
  3. 3.34 + 61 =
  4. 4.64 + 65 =
  5. 5.73 + 66 =
  6. 6.50 + 56 =
  7. 7.56 + 23 =
  8. 8.33 + 55 =
  9. 9.54 + 89 =
  10. 10.48 + 26 =
  11. 11.55 + 56 =
  12. 12.53 + 71 =
  13. 13.57 + 88 =
  14. 14.26 + 51 =
  15. 15.26 + 62 =
  16. 16.77 + 27 =
  17. 17.27 + 81 =
  18. 18.89 + 48 =
  19. 19.38 + 88 =
  20. 20.28 + 14 =
  21. 21.81 + 61 =
  22. 22.72 + 84 =
  23. 23.68 + 26 =
  24. 24.71 + 58 =
  25. 25.70 + 86 =
  26. 26.77 + 85 =
  27. 27.30 + 85 =
  28. 28.24 + 24 =
  29. 29.62 + 65 =
  30. 30.29 + 73 =
  31. 31.82 + 88 =
  32. 32.30 + 71 =
  33. 33.22 + 59 =
  34. 34.69 + 68 =
  35. 35.83 + 37 =
  36. 36.71 + 77 =
  37. 37.47 + 66 =
  38. 38.83 + 31 =
  39. 39.48 + 54 =
  40. 40.44 + 22 =

Answer key

  1. 125
  2. 116
  3. 95
  4. 129
  5. 139
  6. 106
  7. 79
  8. 88
  9. 143
  10. 74
  11. 111
  12. 124
  13. 145
  14. 77
  15. 88
  16. 104
  17. 108
  18. 137
  19. 126
  20. 42
  21. 142
  22. 156
  23. 94
  24. 129
  25. 156
  26. 162
  27. 115
  28. 48
  29. 127
  30. 102
  31. 170
  32. 101
  33. 81
  34. 137
  35. 120
  36. 148
  37. 113
  38. 114
  39. 102
  40. 66

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