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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 586 · 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. 1.52 + 81 =
  2. 2.68 + 79 =
  3. 3.57 + 71 =
  4. 4.28 + 84 =
  5. 5.88 + 18 =
  6. 6.40 + 68 =
  7. 7.35 + 51 =
  8. 8.47 + 21 =
  9. 9.62 + 87 =
  10. 10.53 + 62 =
  11. 11.82 + 79 =
  12. 12.46 + 78 =
  13. 13.31 + 89 =
  14. 14.68 + 87 =
  15. 15.37 + 68 =
  16. 16.40 + 86 =
  17. 17.37 + 12 =
  18. 18.63 + 75 =
  19. 19.48 + 34 =
  20. 20.34 + 71 =
  21. 21.39 + 82 =
  22. 22.85 + 15 =
  23. 23.29 + 33 =
  24. 24.69 + 33 =
  25. 25.27 + 19 =
  26. 26.64 + 84 =
  27. 27.69 + 17 =
  28. 28.38 + 71 =
  29. 29.40 + 81 =
  30. 30.86 + 54 =
  31. 31.55 + 53 =
  32. 32.60 + 43 =
  33. 33.66 + 82 =
  34. 34.44 + 61 =
  35. 35.34 + 62 =
  36. 36.81 + 66 =
  37. 37.50 + 12 =
  38. 38.22 + 81 =
  39. 39.88 + 15 =
  40. 40.72 + 43 =

Answer key

  1. 133
  2. 147
  3. 128
  4. 112
  5. 106
  6. 108
  7. 86
  8. 68
  9. 149
  10. 115
  11. 161
  12. 124
  13. 120
  14. 155
  15. 105
  16. 126
  17. 49
  18. 138
  19. 82
  20. 105
  21. 121
  22. 100
  23. 62
  24. 102
  25. 46
  26. 148
  27. 86
  28. 109
  29. 121
  30. 140
  31. 108
  32. 103
  33. 148
  34. 105
  35. 96
  36. 147
  37. 62
  38. 103
  39. 103
  40. 115

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