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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 241 · 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. 1.52 + 59 =
  2. 2.37 + 51 =
  3. 3.50 + 12 =
  4. 4.75 + 31 =
  5. 5.87 + 22 =
  6. 6.28 + 78 =
  7. 7.73 + 85 =
  8. 8.59 + 41 =
  9. 9.42 + 48 =
  10. 10.41 + 85 =
  11. 11.81 + 16 =
  12. 12.51 + 35 =
  13. 13.24 + 38 =
  14. 14.86 + 15 =
  15. 15.21 + 81 =
  16. 16.33 + 72 =
  17. 17.73 + 51 =
  18. 18.87 + 63 =
  19. 19.77 + 47 =
  20. 20.58 + 21 =
  21. 21.24 + 68 =
  22. 22.32 + 14 =
  23. 23.53 + 34 =
  24. 24.38 + 65 =
  25. 25.26 + 32 =
  26. 26.52 + 39 =
  27. 27.26 + 48 =
  28. 28.80 + 31 =
  29. 29.23 + 31 =
  30. 30.88 + 68 =
  31. 31.31 + 82 =
  32. 32.53 + 41 =
  33. 33.57 + 22 =
  34. 34.80 + 49 =
  35. 35.88 + 77 =
  36. 36.33 + 35 =
  37. 37.21 + 29 =
  38. 38.85 + 31 =
  39. 39.71 + 54 =
  40. 40.29 + 85 =

Answer key

  1. 111
  2. 88
  3. 62
  4. 106
  5. 109
  6. 106
  7. 158
  8. 100
  9. 90
  10. 126
  11. 97
  12. 86
  13. 62
  14. 101
  15. 102
  16. 105
  17. 124
  18. 150
  19. 124
  20. 79
  21. 92
  22. 46
  23. 87
  24. 103
  25. 58
  26. 91
  27. 74
  28. 111
  29. 54
  30. 156
  31. 113
  32. 94
  33. 79
  34. 129
  35. 165
  36. 68
  37. 50
  38. 116
  39. 125
  40. 114

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