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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 249 · 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. 1.45 + 31 =
  2. 2.36 + 68 =
  3. 3.48 + 43 =
  4. 4.55 + 48 =
  5. 5.31 + 74 =
  6. 6.57 + 27 =
  7. 7.30 + 58 =
  8. 8.63 + 17 =
  9. 9.42 + 26 =
  10. 10.77 + 65 =
  11. 11.60 + 42 =
  12. 12.85 + 36 =
  13. 13.51 + 36 =
  14. 14.89 + 15 =
  15. 15.30 + 29 =
  16. 16.28 + 27 =
  17. 17.69 + 42 =
  18. 18.86 + 49 =
  19. 19.21 + 29 =
  20. 20.58 + 32 =
  21. 21.59 + 43 =
  22. 22.70 + 69 =
  23. 23.37 + 41 =
  24. 24.67 + 38 =
  25. 25.29 + 26 =
  26. 26.82 + 77 =
  27. 27.69 + 27 =
  28. 28.87 + 57 =
  29. 29.29 + 64 =
  30. 30.79 + 31 =
  31. 31.53 + 71 =
  32. 32.85 + 72 =
  33. 33.39 + 35 =
  34. 34.30 + 59 =
  35. 35.83 + 73 =
  36. 36.88 + 64 =
  37. 37.24 + 67 =
  38. 38.46 + 46 =
  39. 39.85 + 15 =
  40. 40.23 + 44 =

Answer key

  1. 76
  2. 104
  3. 91
  4. 103
  5. 105
  6. 84
  7. 88
  8. 80
  9. 68
  10. 142
  11. 102
  12. 121
  13. 87
  14. 104
  15. 59
  16. 55
  17. 111
  18. 135
  19. 50
  20. 90
  21. 102
  22. 139
  23. 78
  24. 105
  25. 55
  26. 159
  27. 96
  28. 144
  29. 93
  30. 110
  31. 124
  32. 157
  33. 74
  34. 89
  35. 156
  36. 152
  37. 91
  38. 92
  39. 100
  40. 67

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