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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 688 · 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. 1.28 + 27 =
  2. 2.65 + 57 =
  3. 3.50 + 45 =
  4. 4.23 + 74 =
  5. 5.57 + 49 =
  6. 6.27 + 22 =
  7. 7.27 + 31 =
  8. 8.61 + 17 =
  9. 9.46 + 47 =
  10. 10.22 + 64 =
  11. 11.78 + 76 =
  12. 12.46 + 29 =
  13. 13.86 + 16 =
  14. 14.45 + 21 =
  15. 15.70 + 59 =
  16. 16.38 + 61 =
  17. 17.49 + 74 =
  18. 18.37 + 23 =
  19. 19.24 + 17 =
  20. 20.33 + 86 =
  21. 21.67 + 18 =
  22. 22.34 + 31 =
  23. 23.46 + 48 =
  24. 24.80 + 82 =
  25. 25.86 + 43 =
  26. 26.27 + 51 =
  27. 27.47 + 64 =
  28. 28.40 + 35 =
  29. 29.68 + 49 =
  30. 30.45 + 81 =
  31. 31.82 + 72 =
  32. 32.79 + 15 =
  33. 33.58 + 31 =
  34. 34.55 + 42 =
  35. 35.25 + 34 =
  36. 36.71 + 31 =
  37. 37.65 + 37 =
  38. 38.47 + 88 =
  39. 39.87 + 41 =
  40. 40.73 + 73 =

Answer key

  1. 55
  2. 122
  3. 95
  4. 97
  5. 106
  6. 49
  7. 58
  8. 78
  9. 93
  10. 86
  11. 154
  12. 75
  13. 102
  14. 66
  15. 129
  16. 99
  17. 123
  18. 60
  19. 41
  20. 119
  21. 85
  22. 65
  23. 94
  24. 162
  25. 129
  26. 78
  27. 111
  28. 75
  29. 117
  30. 126
  31. 154
  32. 94
  33. 89
  34. 97
  35. 59
  36. 102
  37. 102
  38. 135
  39. 128
  40. 146

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