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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 240 · 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 + 71 =
  2. 2.41 + 81 =
  3. 3.50 + 82 =
  4. 4.59 + 71 =
  5. 5.40 + 55 =
  6. 6.45 + 22 =
  7. 7.88 + 22 =
  8. 8.34 + 52 =
  9. 9.22 + 26 =
  10. 10.37 + 23 =
  11. 11.29 + 12 =
  12. 12.30 + 18 =
  13. 13.89 + 61 =
  14. 14.89 + 12 =
  15. 15.79 + 18 =
  16. 16.50 + 39 =
  17. 17.57 + 16 =
  18. 18.49 + 15 =
  19. 19.31 + 31 =
  20. 20.66 + 74 =
  21. 21.48 + 22 =
  22. 22.80 + 31 =
  23. 23.87 + 55 =
  24. 24.31 + 55 =
  25. 25.67 + 63 =
  26. 26.50 + 44 =
  27. 27.79 + 86 =
  28. 28.67 + 27 =
  29. 29.85 + 49 =
  30. 30.61 + 55 =
  31. 31.29 + 87 =
  32. 32.34 + 31 =
  33. 33.58 + 27 =
  34. 34.63 + 65 =
  35. 35.88 + 19 =
  36. 36.66 + 85 =
  37. 37.26 + 42 =
  38. 38.29 + 26 =
  39. 39.81 + 82 =
  40. 40.59 + 48 =

Answer key

  1. 133
  2. 122
  3. 132
  4. 130
  5. 95
  6. 67
  7. 110
  8. 86
  9. 48
  10. 60
  11. 41
  12. 48
  13. 150
  14. 101
  15. 97
  16. 89
  17. 73
  18. 64
  19. 62
  20. 140
  21. 70
  22. 111
  23. 142
  24. 86
  25. 130
  26. 94
  27. 165
  28. 94
  29. 134
  30. 116
  31. 116
  32. 65
  33. 85
  34. 128
  35. 107
  36. 151
  37. 68
  38. 55
  39. 163
  40. 107

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