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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 303 · 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. 1.73 + 25 =
  2. 2.27 + 55 =
  3. 3.68 + 61 =
  4. 4.70 + 31 =
  5. 5.74 + 28 =
  6. 6.46 + 46 =
  7. 7.87 + 32 =
  8. 8.40 + 57 =
  9. 9.30 + 86 =
  10. 10.73 + 44 =
  11. 11.35 + 88 =
  12. 12.29 + 16 =
  13. 13.29 + 67 =
  14. 14.74 + 48 =
  15. 15.82 + 66 =
  16. 16.27 + 44 =
  17. 17.55 + 45 =
  18. 18.63 + 14 =
  19. 19.29 + 29 =
  20. 20.58 + 51 =
  21. 21.50 + 32 =
  22. 22.57 + 52 =
  23. 23.50 + 17 =
  24. 24.89 + 26 =
  25. 25.35 + 77 =
  26. 26.25 + 83 =
  27. 27.48 + 67 =
  28. 28.42 + 44 =
  29. 29.47 + 73 =
  30. 30.33 + 33 =
  31. 31.46 + 53 =
  32. 32.78 + 88 =
  33. 33.43 + 46 =
  34. 34.87 + 26 =
  35. 35.72 + 61 =
  36. 36.71 + 73 =
  37. 37.36 + 89 =
  38. 38.24 + 36 =
  39. 39.27 + 59 =
  40. 40.45 + 66 =

Answer key

  1. 98
  2. 82
  3. 129
  4. 101
  5. 102
  6. 92
  7. 119
  8. 97
  9. 116
  10. 117
  11. 123
  12. 45
  13. 96
  14. 122
  15. 148
  16. 71
  17. 100
  18. 77
  19. 58
  20. 109
  21. 82
  22. 109
  23. 67
  24. 115
  25. 112
  26. 108
  27. 115
  28. 86
  29. 120
  30. 66
  31. 99
  32. 166
  33. 89
  34. 113
  35. 133
  36. 144
  37. 125
  38. 60
  39. 86
  40. 111

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