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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 582 · 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. 1.42 + 38 =
  2. 2.31 + 19 =
  3. 3.52 + 14 =
  4. 4.69 + 21 =
  5. 5.39 + 33 =
  6. 6.45 + 43 =
  7. 7.66 + 25 =
  8. 8.56 + 89 =
  9. 9.28 + 58 =
  10. 10.26 + 87 =
  11. 11.66 + 44 =
  12. 12.67 + 31 =
  13. 13.45 + 87 =
  14. 14.89 + 45 =
  15. 15.42 + 31 =
  16. 16.58 + 64 =
  17. 17.58 + 48 =
  18. 18.72 + 16 =
  19. 19.78 + 54 =
  20. 20.23 + 86 =
  21. 21.28 + 36 =
  22. 22.25 + 69 =
  23. 23.48 + 85 =
  24. 24.40 + 67 =
  25. 25.59 + 23 =
  26. 26.70 + 23 =
  27. 27.52 + 66 =
  28. 28.63 + 46 =
  29. 29.35 + 22 =
  30. 30.86 + 21 =
  31. 31.38 + 25 =
  32. 32.42 + 83 =
  33. 33.80 + 69 =
  34. 34.70 + 81 =
  35. 35.84 + 65 =
  36. 36.34 + 33 =
  37. 37.38 + 13 =
  38. 38.80 + 51 =
  39. 39.22 + 72 =
  40. 40.37 + 14 =

Answer key

  1. 80
  2. 50
  3. 66
  4. 90
  5. 72
  6. 88
  7. 91
  8. 145
  9. 86
  10. 113
  11. 110
  12. 98
  13. 132
  14. 134
  15. 73
  16. 122
  17. 106
  18. 88
  19. 132
  20. 109
  21. 64
  22. 94
  23. 133
  24. 107
  25. 82
  26. 93
  27. 118
  28. 109
  29. 57
  30. 107
  31. 63
  32. 125
  33. 149
  34. 151
  35. 149
  36. 67
  37. 51
  38. 131
  39. 94
  40. 51

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