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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 661 · 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. 1.30 + 22 =
  2. 2.88 + 48 =
  3. 3.21 + 41 =
  4. 4.37 + 35 =
  5. 5.21 + 24 =
  6. 6.43 + 66 =
  7. 7.78 + 45 =
  8. 8.52 + 34 =
  9. 9.81 + 66 =
  10. 10.42 + 18 =
  11. 11.31 + 83 =
  12. 12.40 + 74 =
  13. 13.72 + 39 =
  14. 14.89 + 38 =
  15. 15.45 + 12 =
  16. 16.68 + 12 =
  17. 17.79 + 14 =
  18. 18.89 + 84 =
  19. 19.40 + 18 =
  20. 20.78 + 47 =
  21. 21.63 + 24 =
  22. 22.23 + 21 =
  23. 23.52 + 69 =
  24. 24.37 + 53 =
  25. 25.47 + 12 =
  26. 26.76 + 34 =
  27. 27.47 + 63 =
  28. 28.76 + 53 =
  29. 29.70 + 53 =
  30. 30.71 + 29 =
  31. 31.27 + 31 =
  32. 32.41 + 51 =
  33. 33.21 + 12 =
  34. 34.38 + 58 =
  35. 35.45 + 35 =
  36. 36.78 + 71 =
  37. 37.30 + 51 =
  38. 38.69 + 83 =
  39. 39.46 + 57 =
  40. 40.26 + 61 =

Answer key

  1. 52
  2. 136
  3. 62
  4. 72
  5. 45
  6. 109
  7. 123
  8. 86
  9. 147
  10. 60
  11. 114
  12. 114
  13. 111
  14. 127
  15. 57
  16. 80
  17. 93
  18. 173
  19. 58
  20. 125
  21. 87
  22. 44
  23. 121
  24. 90
  25. 59
  26. 110
  27. 110
  28. 129
  29. 123
  30. 100
  31. 58
  32. 92
  33. 33
  34. 96
  35. 80
  36. 149
  37. 81
  38. 152
  39. 103
  40. 87

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