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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 516 · 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. 1.82 + 84 =
  2. 2.34 + 16 =
  3. 3.87 + 85 =
  4. 4.27 + 19 =
  5. 5.28 + 81 =
  6. 6.61 + 55 =
  7. 7.31 + 55 =
  8. 8.73 + 33 =
  9. 9.38 + 25 =
  10. 10.73 + 13 =
  11. 11.59 + 41 =
  12. 12.61 + 39 =
  13. 13.38 + 35 =
  14. 14.76 + 13 =
  15. 15.51 + 12 =
  16. 16.71 + 61 =
  17. 17.44 + 29 =
  18. 18.43 + 53 =
  19. 19.25 + 18 =
  20. 20.66 + 24 =
  21. 21.63 + 14 =
  22. 22.29 + 58 =
  23. 23.69 + 89 =
  24. 24.31 + 16 =
  25. 25.73 + 16 =
  26. 26.40 + 57 =
  27. 27.64 + 31 =
  28. 28.39 + 79 =
  29. 29.81 + 32 =
  30. 30.75 + 61 =
  31. 31.73 + 71 =
  32. 32.61 + 25 =
  33. 33.25 + 89 =
  34. 34.47 + 19 =
  35. 35.61 + 66 =
  36. 36.84 + 34 =
  37. 37.56 + 31 =
  38. 38.56 + 21 =
  39. 39.35 + 59 =
  40. 40.60 + 43 =

Answer key

  1. 166
  2. 50
  3. 172
  4. 46
  5. 109
  6. 116
  7. 86
  8. 106
  9. 63
  10. 86
  11. 100
  12. 100
  13. 73
  14. 89
  15. 63
  16. 132
  17. 73
  18. 96
  19. 43
  20. 90
  21. 77
  22. 87
  23. 158
  24. 47
  25. 89
  26. 97
  27. 95
  28. 118
  29. 113
  30. 136
  31. 144
  32. 86
  33. 114
  34. 66
  35. 127
  36. 118
  37. 87
  38. 77
  39. 94
  40. 103

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