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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 522 · 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. 1.64 + 61 =
  2. 2.47 + 47 =
  3. 3.66 + 58 =
  4. 4.66 + 38 =
  5. 5.45 + 17 =
  6. 6.32 + 83 =
  7. 7.33 + 56 =
  8. 8.84 + 55 =
  9. 9.30 + 63 =
  10. 10.89 + 28 =
  11. 11.58 + 19 =
  12. 12.61 + 27 =
  13. 13.45 + 45 =
  14. 14.44 + 41 =
  15. 15.47 + 62 =
  16. 16.74 + 82 =
  17. 17.61 + 21 =
  18. 18.49 + 12 =
  19. 19.78 + 35 =
  20. 20.25 + 75 =
  21. 21.40 + 51 =
  22. 22.48 + 46 =
  23. 23.53 + 19 =
  24. 24.78 + 29 =
  25. 25.65 + 52 =
  26. 26.69 + 35 =
  27. 27.62 + 78 =
  28. 28.29 + 57 =
  29. 29.25 + 36 =
  30. 30.58 + 67 =
  31. 31.27 + 13 =
  32. 32.61 + 56 =
  33. 33.53 + 69 =
  34. 34.50 + 43 =
  35. 35.88 + 77 =
  36. 36.77 + 18 =
  37. 37.35 + 33 =
  38. 38.56 + 26 =
  39. 39.44 + 19 =
  40. 40.69 + 79 =

Answer key

  1. 125
  2. 94
  3. 124
  4. 104
  5. 62
  6. 115
  7. 89
  8. 139
  9. 93
  10. 117
  11. 77
  12. 88
  13. 90
  14. 85
  15. 109
  16. 156
  17. 82
  18. 61
  19. 113
  20. 100
  21. 91
  22. 94
  23. 72
  24. 107
  25. 117
  26. 104
  27. 140
  28. 86
  29. 61
  30. 125
  31. 40
  32. 117
  33. 122
  34. 93
  35. 165
  36. 95
  37. 68
  38. 82
  39. 63
  40. 148

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