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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 606 · 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. 1.62 + 28 =
  2. 2.29 + 28 =
  3. 3.27 + 27 =
  4. 4.57 + 14 =
  5. 5.35 + 41 =
  6. 6.63 + 16 =
  7. 7.49 + 53 =
  8. 8.54 + 12 =
  9. 9.38 + 27 =
  10. 10.34 + 23 =
  11. 11.25 + 33 =
  12. 12.32 + 12 =
  13. 13.84 + 43 =
  14. 14.89 + 72 =
  15. 15.60 + 18 =
  16. 16.77 + 69 =
  17. 17.65 + 44 =
  18. 18.22 + 49 =
  19. 19.39 + 89 =
  20. 20.59 + 47 =
  21. 21.46 + 71 =
  22. 22.53 + 81 =
  23. 23.26 + 89 =
  24. 24.43 + 59 =
  25. 25.39 + 76 =
  26. 26.41 + 64 =
  27. 27.79 + 12 =
  28. 28.60 + 22 =
  29. 29.65 + 26 =
  30. 30.78 + 42 =
  31. 31.80 + 14 =
  32. 32.40 + 28 =
  33. 33.24 + 89 =
  34. 34.64 + 51 =
  35. 35.24 + 62 =
  36. 36.32 + 76 =
  37. 37.43 + 57 =
  38. 38.80 + 22 =
  39. 39.33 + 62 =
  40. 40.76 + 88 =

Answer key

  1. 90
  2. 57
  3. 54
  4. 71
  5. 76
  6. 79
  7. 102
  8. 66
  9. 65
  10. 57
  11. 58
  12. 44
  13. 127
  14. 161
  15. 78
  16. 146
  17. 109
  18. 71
  19. 128
  20. 106
  21. 117
  22. 134
  23. 115
  24. 102
  25. 115
  26. 105
  27. 91
  28. 82
  29. 91
  30. 120
  31. 94
  32. 68
  33. 113
  34. 115
  35. 86
  36. 108
  37. 100
  38. 102
  39. 95
  40. 164

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