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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 550 · 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. 1.28 + 58 =
  2. 2.40 + 16 =
  3. 3.33 + 86 =
  4. 4.81 + 31 =
  5. 5.71 + 21 =
  6. 6.46 + 28 =
  7. 7.67 + 61 =
  8. 8.63 + 66 =
  9. 9.72 + 14 =
  10. 10.38 + 41 =
  11. 11.60 + 53 =
  12. 12.84 + 18 =
  13. 13.80 + 33 =
  14. 14.34 + 63 =
  15. 15.79 + 32 =
  16. 16.38 + 61 =
  17. 17.21 + 38 =
  18. 18.30 + 44 =
  19. 19.43 + 39 =
  20. 20.30 + 73 =
  21. 21.68 + 61 =
  22. 22.58 + 32 =
  23. 23.29 + 64 =
  24. 24.68 + 85 =
  25. 25.58 + 86 =
  26. 26.26 + 79 =
  27. 27.70 + 82 =
  28. 28.35 + 42 =
  29. 29.81 + 78 =
  30. 30.74 + 38 =
  31. 31.28 + 51 =
  32. 32.71 + 26 =
  33. 33.86 + 34 =
  34. 34.24 + 41 =
  35. 35.39 + 16 =
  36. 36.89 + 12 =
  37. 37.75 + 77 =
  38. 38.61 + 77 =
  39. 39.72 + 72 =
  40. 40.70 + 36 =

Answer key

  1. 86
  2. 56
  3. 119
  4. 112
  5. 92
  6. 74
  7. 128
  8. 129
  9. 86
  10. 79
  11. 113
  12. 102
  13. 113
  14. 97
  15. 111
  16. 99
  17. 59
  18. 74
  19. 82
  20. 103
  21. 129
  22. 90
  23. 93
  24. 153
  25. 144
  26. 105
  27. 152
  28. 77
  29. 159
  30. 112
  31. 79
  32. 97
  33. 120
  34. 65
  35. 55
  36. 101
  37. 152
  38. 138
  39. 144
  40. 106

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