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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 624 · 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 + 81 =
  2. 2.35 + 27 =
  3. 3.80 + 26 =
  4. 4.67 + 26 =
  5. 5.72 + 34 =
  6. 6.88 + 82 =
  7. 7.49 + 66 =
  8. 8.73 + 18 =
  9. 9.43 + 37 =
  10. 10.58 + 38 =
  11. 11.63 + 14 =
  12. 12.72 + 41 =
  13. 13.47 + 42 =
  14. 14.46 + 23 =
  15. 15.89 + 41 =
  16. 16.76 + 28 =
  17. 17.58 + 19 =
  18. 18.33 + 24 =
  19. 19.56 + 75 =
  20. 20.77 + 44 =
  21. 21.51 + 45 =
  22. 22.74 + 61 =
  23. 23.89 + 31 =
  24. 24.33 + 22 =
  25. 25.22 + 37 =
  26. 26.87 + 17 =
  27. 27.72 + 32 =
  28. 28.24 + 68 =
  29. 29.63 + 78 =
  30. 30.87 + 51 =
  31. 31.38 + 43 =
  32. 32.50 + 33 =
  33. 33.54 + 41 =
  34. 34.21 + 61 =
  35. 35.83 + 43 =
  36. 36.77 + 89 =
  37. 37.62 + 79 =
  38. 38.89 + 14 =
  39. 39.88 + 17 =
  40. 40.82 + 81 =

Answer key

  1. 154
  2. 62
  3. 106
  4. 93
  5. 106
  6. 170
  7. 115
  8. 91
  9. 80
  10. 96
  11. 77
  12. 113
  13. 89
  14. 69
  15. 130
  16. 104
  17. 77
  18. 57
  19. 131
  20. 121
  21. 96
  22. 135
  23. 120
  24. 55
  25. 59
  26. 104
  27. 104
  28. 92
  29. 141
  30. 138
  31. 81
  32. 83
  33. 95
  34. 82
  35. 126
  36. 166
  37. 141
  38. 103
  39. 105
  40. 163

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