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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 815 · 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. 1.23 + 83 =
  2. 2.77 + 45 =
  3. 3.57 + 63 =
  4. 4.73 + 21 =
  5. 5.37 + 66 =
  6. 6.30 + 49 =
  7. 7.75 + 43 =
  8. 8.50 + 84 =
  9. 9.45 + 89 =
  10. 10.82 + 39 =
  11. 11.56 + 88 =
  12. 12.22 + 63 =
  13. 13.23 + 34 =
  14. 14.27 + 15 =
  15. 15.54 + 85 =
  16. 16.62 + 87 =
  17. 17.68 + 64 =
  18. 18.55 + 63 =
  19. 19.22 + 84 =
  20. 20.43 + 14 =
  21. 21.51 + 44 =
  22. 22.70 + 42 =
  23. 23.27 + 14 =
  24. 24.89 + 31 =
  25. 25.88 + 71 =
  26. 26.76 + 88 =
  27. 27.53 + 81 =
  28. 28.40 + 38 =
  29. 29.35 + 34 =
  30. 30.70 + 22 =
  31. 31.80 + 49 =
  32. 32.37 + 44 =
  33. 33.42 + 21 =
  34. 34.86 + 45 =
  35. 35.86 + 84 =
  36. 36.59 + 26 =
  37. 37.21 + 24 =
  38. 38.43 + 71 =
  39. 39.43 + 79 =
  40. 40.88 + 51 =

Answer key

  1. 106
  2. 122
  3. 120
  4. 94
  5. 103
  6. 79
  7. 118
  8. 134
  9. 134
  10. 121
  11. 144
  12. 85
  13. 57
  14. 42
  15. 139
  16. 149
  17. 132
  18. 118
  19. 106
  20. 57
  21. 95
  22. 112
  23. 41
  24. 120
  25. 159
  26. 164
  27. 134
  28. 78
  29. 69
  30. 92
  31. 129
  32. 81
  33. 63
  34. 131
  35. 170
  36. 85
  37. 45
  38. 114
  39. 122
  40. 139

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