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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 459 · 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. 1.73 + 82 =
  2. 2.26 + 83 =
  3. 3.63 + 57 =
  4. 4.25 + 61 =
  5. 5.71 + 38 =
  6. 6.67 + 61 =
  7. 7.44 + 19 =
  8. 8.57 + 12 =
  9. 9.76 + 56 =
  10. 10.40 + 71 =
  11. 11.48 + 26 =
  12. 12.24 + 18 =
  13. 13.35 + 65 =
  14. 14.77 + 15 =
  15. 15.69 + 49 =
  16. 16.42 + 76 =
  17. 17.74 + 41 =
  18. 18.30 + 81 =
  19. 19.32 + 81 =
  20. 20.55 + 46 =
  21. 21.85 + 72 =
  22. 22.55 + 53 =
  23. 23.38 + 82 =
  24. 24.89 + 78 =
  25. 25.67 + 57 =
  26. 26.76 + 48 =
  27. 27.80 + 31 =
  28. 28.34 + 21 =
  29. 29.55 + 44 =
  30. 30.45 + 79 =
  31. 31.23 + 49 =
  32. 32.28 + 69 =
  33. 33.75 + 41 =
  34. 34.29 + 29 =
  35. 35.65 + 42 =
  36. 36.44 + 52 =
  37. 37.22 + 88 =
  38. 38.23 + 68 =
  39. 39.86 + 85 =
  40. 40.33 + 31 =

Answer key

  1. 155
  2. 109
  3. 120
  4. 86
  5. 109
  6. 128
  7. 63
  8. 69
  9. 132
  10. 111
  11. 74
  12. 42
  13. 100
  14. 92
  15. 118
  16. 118
  17. 115
  18. 111
  19. 113
  20. 101
  21. 157
  22. 108
  23. 120
  24. 167
  25. 124
  26. 124
  27. 111
  28. 55
  29. 99
  30. 124
  31. 72
  32. 97
  33. 116
  34. 58
  35. 107
  36. 96
  37. 110
  38. 91
  39. 171
  40. 64

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