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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 259 · 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. 1.57 + 45 =
  2. 2.67 + 71 =
  3. 3.61 + 28 =
  4. 4.83 + 85 =
  5. 5.39 + 35 =
  6. 6.79 + 51 =
  7. 7.72 + 59 =
  8. 8.83 + 61 =
  9. 9.49 + 55 =
  10. 10.49 + 81 =
  11. 11.21 + 63 =
  12. 12.72 + 28 =
  13. 13.28 + 21 =
  14. 14.73 + 87 =
  15. 15.26 + 85 =
  16. 16.51 + 74 =
  17. 17.40 + 89 =
  18. 18.22 + 63 =
  19. 19.25 + 84 =
  20. 20.76 + 15 =
  21. 21.36 + 13 =
  22. 22.31 + 25 =
  23. 23.89 + 82 =
  24. 24.89 + 34 =
  25. 25.88 + 33 =
  26. 26.23 + 36 =
  27. 27.68 + 58 =
  28. 28.32 + 41 =
  29. 29.29 + 79 =
  30. 30.35 + 88 =
  31. 31.74 + 86 =
  32. 32.32 + 18 =
  33. 33.88 + 45 =
  34. 34.41 + 41 =
  35. 35.59 + 82 =
  36. 36.27 + 19 =
  37. 37.50 + 59 =
  38. 38.88 + 25 =
  39. 39.32 + 22 =
  40. 40.89 + 86 =

Answer key

  1. 102
  2. 138
  3. 89
  4. 168
  5. 74
  6. 130
  7. 131
  8. 144
  9. 104
  10. 130
  11. 84
  12. 100
  13. 49
  14. 160
  15. 111
  16. 125
  17. 129
  18. 85
  19. 109
  20. 91
  21. 49
  22. 56
  23. 171
  24. 123
  25. 121
  26. 59
  27. 126
  28. 73
  29. 108
  30. 123
  31. 160
  32. 50
  33. 133
  34. 82
  35. 141
  36. 46
  37. 109
  38. 113
  39. 54
  40. 175

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