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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 538 · 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 + 67 =
  2. 2.55 + 44 =
  3. 3.61 + 61 =
  4. 4.49 + 83 =
  5. 5.22 + 23 =
  6. 6.43 + 71 =
  7. 7.28 + 83 =
  8. 8.41 + 84 =
  9. 9.80 + 59 =
  10. 10.80 + 73 =
  11. 11.89 + 61 =
  12. 12.56 + 47 =
  13. 13.38 + 58 =
  14. 14.43 + 44 =
  15. 15.30 + 43 =
  16. 16.50 + 24 =
  17. 17.49 + 59 =
  18. 18.55 + 65 =
  19. 19.48 + 61 =
  20. 20.76 + 22 =
  21. 21.45 + 38 =
  22. 22.58 + 38 =
  23. 23.23 + 61 =
  24. 24.85 + 12 =
  25. 25.35 + 77 =
  26. 26.24 + 51 =
  27. 27.59 + 16 =
  28. 28.86 + 29 =
  29. 29.39 + 19 =
  30. 30.31 + 32 =
  31. 31.33 + 33 =
  32. 32.61 + 45 =
  33. 33.28 + 81 =
  34. 34.88 + 21 =
  35. 35.72 + 41 =
  36. 36.29 + 69 =
  37. 37.33 + 32 =
  38. 38.63 + 28 =
  39. 39.74 + 81 =
  40. 40.49 + 26 =

Answer key

  1. 139
  2. 99
  3. 122
  4. 132
  5. 45
  6. 114
  7. 111
  8. 125
  9. 139
  10. 153
  11. 150
  12. 103
  13. 96
  14. 87
  15. 73
  16. 74
  17. 108
  18. 120
  19. 109
  20. 98
  21. 83
  22. 96
  23. 84
  24. 97
  25. 112
  26. 75
  27. 75
  28. 115
  29. 58
  30. 63
  31. 66
  32. 106
  33. 109
  34. 109
  35. 113
  36. 98
  37. 65
  38. 91
  39. 155
  40. 75

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