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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 451 · 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. 1.77 + 49 =
  2. 2.34 + 64 =
  3. 3.68 + 86 =
  4. 4.47 + 84 =
  5. 5.46 + 46 =
  6. 6.72 + 51 =
  7. 7.50 + 66 =
  8. 8.50 + 83 =
  9. 9.80 + 81 =
  10. 10.47 + 31 =
  11. 11.70 + 75 =
  12. 12.57 + 24 =
  13. 13.36 + 42 =
  14. 14.76 + 31 =
  15. 15.49 + 29 =
  16. 16.86 + 36 =
  17. 17.58 + 17 =
  18. 18.46 + 54 =
  19. 19.25 + 12 =
  20. 20.26 + 55 =
  21. 21.51 + 57 =
  22. 22.33 + 79 =
  23. 23.53 + 58 =
  24. 24.71 + 68 =
  25. 25.84 + 41 =
  26. 26.49 + 62 =
  27. 27.39 + 58 =
  28. 28.81 + 22 =
  29. 29.89 + 76 =
  30. 30.56 + 88 =
  31. 31.77 + 72 =
  32. 32.25 + 66 =
  33. 33.36 + 72 =
  34. 34.67 + 18 =
  35. 35.68 + 81 =
  36. 36.32 + 22 =
  37. 37.48 + 21 =
  38. 38.79 + 89 =
  39. 39.83 + 37 =
  40. 40.45 + 23 =

Answer key

  1. 126
  2. 98
  3. 154
  4. 131
  5. 92
  6. 123
  7. 116
  8. 133
  9. 161
  10. 78
  11. 145
  12. 81
  13. 78
  14. 107
  15. 78
  16. 122
  17. 75
  18. 100
  19. 37
  20. 81
  21. 108
  22. 112
  23. 111
  24. 139
  25. 125
  26. 111
  27. 97
  28. 103
  29. 165
  30. 144
  31. 149
  32. 91
  33. 108
  34. 85
  35. 149
  36. 54
  37. 69
  38. 168
  39. 120
  40. 68

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