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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 524 · 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. 1.79 + 19 =
  2. 2.87 + 51 =
  3. 3.44 + 14 =
  4. 4.37 + 49 =
  5. 5.26 + 31 =
  6. 6.80 + 75 =
  7. 7.71 + 84 =
  8. 8.67 + 58 =
  9. 9.52 + 81 =
  10. 10.58 + 15 =
  11. 11.68 + 78 =
  12. 12.38 + 51 =
  13. 13.85 + 27 =
  14. 14.22 + 49 =
  15. 15.35 + 52 =
  16. 16.27 + 12 =
  17. 17.26 + 71 =
  18. 18.52 + 86 =
  19. 19.47 + 61 =
  20. 20.46 + 48 =
  21. 21.28 + 83 =
  22. 22.44 + 22 =
  23. 23.86 + 33 =
  24. 24.58 + 47 =
  25. 25.49 + 69 =
  26. 26.64 + 45 =
  27. 27.80 + 72 =
  28. 28.73 + 53 =
  29. 29.56 + 67 =
  30. 30.32 + 31 =
  31. 31.75 + 12 =
  32. 32.51 + 66 =
  33. 33.34 + 54 =
  34. 34.73 + 42 =
  35. 35.64 + 35 =
  36. 36.86 + 74 =
  37. 37.64 + 32 =
  38. 38.27 + 55 =
  39. 39.56 + 56 =
  40. 40.40 + 74 =

Answer key

  1. 98
  2. 138
  3. 58
  4. 86
  5. 57
  6. 155
  7. 155
  8. 125
  9. 133
  10. 73
  11. 146
  12. 89
  13. 112
  14. 71
  15. 87
  16. 39
  17. 97
  18. 138
  19. 108
  20. 94
  21. 111
  22. 66
  23. 119
  24. 105
  25. 118
  26. 109
  27. 152
  28. 126
  29. 123
  30. 63
  31. 87
  32. 117
  33. 88
  34. 115
  35. 99
  36. 160
  37. 96
  38. 82
  39. 112
  40. 114

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