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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 263 · 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. 1.63 + 61 =
  2. 2.28 + 89 =
  3. 3.79 + 62 =
  4. 4.67 + 31 =
  5. 5.69 + 41 =
  6. 6.47 + 21 =
  7. 7.23 + 54 =
  8. 8.47 + 28 =
  9. 9.36 + 69 =
  10. 10.54 + 71 =
  11. 11.28 + 81 =
  12. 12.41 + 59 =
  13. 13.63 + 22 =
  14. 14.84 + 81 =
  15. 15.87 + 26 =
  16. 16.89 + 39 =
  17. 17.62 + 81 =
  18. 18.33 + 54 =
  19. 19.69 + 72 =
  20. 20.37 + 77 =
  21. 21.74 + 55 =
  22. 22.48 + 74 =
  23. 23.44 + 51 =
  24. 24.78 + 27 =
  25. 25.83 + 82 =
  26. 26.43 + 47 =
  27. 27.43 + 57 =
  28. 28.45 + 58 =
  29. 29.27 + 63 =
  30. 30.68 + 26 =
  31. 31.23 + 85 =
  32. 32.62 + 77 =
  33. 33.64 + 49 =
  34. 34.55 + 31 =
  35. 35.87 + 16 =
  36. 36.47 + 64 =
  37. 37.35 + 22 =
  38. 38.50 + 42 =
  39. 39.50 + 86 =
  40. 40.34 + 18 =

Answer key

  1. 124
  2. 117
  3. 141
  4. 98
  5. 110
  6. 68
  7. 77
  8. 75
  9. 105
  10. 125
  11. 109
  12. 100
  13. 85
  14. 165
  15. 113
  16. 128
  17. 143
  18. 87
  19. 141
  20. 114
  21. 129
  22. 122
  23. 95
  24. 105
  25. 165
  26. 90
  27. 100
  28. 103
  29. 90
  30. 94
  31. 108
  32. 139
  33. 113
  34. 86
  35. 103
  36. 111
  37. 57
  38. 92
  39. 136
  40. 52

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