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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 460 · 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. 1.72 + 23 =
  2. 2.65 + 14 =
  3. 3.42 + 85 =
  4. 4.22 + 42 =
  5. 5.86 + 12 =
  6. 6.47 + 27 =
  7. 7.40 + 46 =
  8. 8.36 + 75 =
  9. 9.47 + 13 =
  10. 10.33 + 75 =
  11. 11.78 + 13 =
  12. 12.27 + 69 =
  13. 13.41 + 49 =
  14. 14.63 + 88 =
  15. 15.83 + 29 =
  16. 16.68 + 22 =
  17. 17.46 + 47 =
  18. 18.73 + 36 =
  19. 19.78 + 59 =
  20. 20.40 + 17 =
  21. 21.55 + 82 =
  22. 22.70 + 38 =
  23. 23.34 + 72 =
  24. 24.25 + 59 =
  25. 25.70 + 72 =
  26. 26.71 + 76 =
  27. 27.47 + 53 =
  28. 28.75 + 67 =
  29. 29.34 + 33 =
  30. 30.83 + 28 =
  31. 31.73 + 62 =
  32. 32.58 + 74 =
  33. 33.88 + 35 =
  34. 34.51 + 46 =
  35. 35.42 + 51 =
  36. 36.65 + 34 =
  37. 37.61 + 25 =
  38. 38.88 + 14 =
  39. 39.61 + 22 =
  40. 40.65 + 66 =

Answer key

  1. 95
  2. 79
  3. 127
  4. 64
  5. 98
  6. 74
  7. 86
  8. 111
  9. 60
  10. 108
  11. 91
  12. 96
  13. 90
  14. 151
  15. 112
  16. 90
  17. 93
  18. 109
  19. 137
  20. 57
  21. 137
  22. 108
  23. 106
  24. 84
  25. 142
  26. 147
  27. 100
  28. 142
  29. 67
  30. 111
  31. 135
  32. 132
  33. 123
  34. 97
  35. 93
  36. 99
  37. 86
  38. 102
  39. 83
  40. 131

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