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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 619 · 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. 1.38 + 59 =
  2. 2.56 + 61 =
  3. 3.34 + 44 =
  4. 4.26 + 85 =
  5. 5.58 + 52 =
  6. 6.51 + 65 =
  7. 7.21 + 65 =
  8. 8.83 + 26 =
  9. 9.39 + 49 =
  10. 10.47 + 27 =
  11. 11.26 + 61 =
  12. 12.52 + 13 =
  13. 13.25 + 17 =
  14. 14.75 + 56 =
  15. 15.54 + 14 =
  16. 16.42 + 35 =
  17. 17.74 + 31 =
  18. 18.36 + 21 =
  19. 19.50 + 84 =
  20. 20.63 + 27 =
  21. 21.23 + 49 =
  22. 22.25 + 47 =
  23. 23.51 + 76 =
  24. 24.28 + 75 =
  25. 25.56 + 33 =
  26. 26.25 + 43 =
  27. 27.79 + 33 =
  28. 28.77 + 43 =
  29. 29.41 + 57 =
  30. 30.39 + 35 =
  31. 31.80 + 41 =
  32. 32.71 + 28 =
  33. 33.78 + 72 =
  34. 34.23 + 56 =
  35. 35.35 + 55 =
  36. 36.24 + 54 =
  37. 37.21 + 24 =
  38. 38.31 + 56 =
  39. 39.49 + 78 =
  40. 40.54 + 66 =

Answer key

  1. 97
  2. 117
  3. 78
  4. 111
  5. 110
  6. 116
  7. 86
  8. 109
  9. 88
  10. 74
  11. 87
  12. 65
  13. 42
  14. 131
  15. 68
  16. 77
  17. 105
  18. 57
  19. 134
  20. 90
  21. 72
  22. 72
  23. 127
  24. 103
  25. 89
  26. 68
  27. 112
  28. 120
  29. 98
  30. 74
  31. 121
  32. 99
  33. 150
  34. 79
  35. 90
  36. 78
  37. 45
  38. 87
  39. 127
  40. 120

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