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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 725 · 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. 1.57 + 34 =
  2. 2.88 + 27 =
  3. 3.40 + 17 =
  4. 4.42 + 51 =
  5. 5.22 + 61 =
  6. 6.37 + 74 =
  7. 7.38 + 69 =
  8. 8.21 + 37 =
  9. 9.48 + 51 =
  10. 10.34 + 77 =
  11. 11.82 + 66 =
  12. 12.35 + 16 =
  13. 13.23 + 71 =
  14. 14.40 + 74 =
  15. 15.30 + 55 =
  16. 16.61 + 43 =
  17. 17.29 + 75 =
  18. 18.35 + 61 =
  19. 19.64 + 14 =
  20. 20.59 + 26 =
  21. 21.68 + 14 =
  22. 22.54 + 57 =
  23. 23.73 + 27 =
  24. 24.38 + 38 =
  25. 25.53 + 75 =
  26. 26.33 + 34 =
  27. 27.43 + 88 =
  28. 28.33 + 33 =
  29. 29.75 + 19 =
  30. 30.67 + 62 =
  31. 31.64 + 31 =
  32. 32.49 + 21 =
  33. 33.58 + 62 =
  34. 34.32 + 18 =
  35. 35.55 + 21 =
  36. 36.79 + 44 =
  37. 37.74 + 74 =
  38. 38.63 + 21 =
  39. 39.82 + 19 =
  40. 40.66 + 16 =

Answer key

  1. 91
  2. 115
  3. 57
  4. 93
  5. 83
  6. 111
  7. 107
  8. 58
  9. 99
  10. 111
  11. 148
  12. 51
  13. 94
  14. 114
  15. 85
  16. 104
  17. 104
  18. 96
  19. 78
  20. 85
  21. 82
  22. 111
  23. 100
  24. 76
  25. 128
  26. 67
  27. 131
  28. 66
  29. 94
  30. 129
  31. 95
  32. 70
  33. 120
  34. 50
  35. 76
  36. 123
  37. 148
  38. 84
  39. 101
  40. 82

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