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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 310 · 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. 1.85 + 71 =
  2. 2.33 + 82 =
  3. 3.75 + 56 =
  4. 4.33 + 46 =
  5. 5.62 + 82 =
  6. 6.34 + 78 =
  7. 7.72 + 76 =
  8. 8.68 + 28 =
  9. 9.27 + 71 =
  10. 10.49 + 87 =
  11. 11.34 + 82 =
  12. 12.48 + 86 =
  13. 13.76 + 16 =
  14. 14.36 + 43 =
  15. 15.45 + 42 =
  16. 16.40 + 34 =
  17. 17.55 + 17 =
  18. 18.45 + 74 =
  19. 19.72 + 21 =
  20. 20.39 + 58 =
  21. 21.61 + 77 =
  22. 22.29 + 59 =
  23. 23.75 + 34 =
  24. 24.30 + 15 =
  25. 25.39 + 21 =
  26. 26.34 + 34 =
  27. 27.68 + 56 =
  28. 28.40 + 36 =
  29. 29.69 + 31 =
  30. 30.22 + 29 =
  31. 31.61 + 89 =
  32. 32.83 + 47 =
  33. 33.78 + 88 =
  34. 34.41 + 51 =
  35. 35.82 + 39 =
  36. 36.85 + 45 =
  37. 37.63 + 81 =
  38. 38.60 + 32 =
  39. 39.65 + 89 =
  40. 40.31 + 69 =

Answer key

  1. 156
  2. 115
  3. 131
  4. 79
  5. 144
  6. 112
  7. 148
  8. 96
  9. 98
  10. 136
  11. 116
  12. 134
  13. 92
  14. 79
  15. 87
  16. 74
  17. 72
  18. 119
  19. 93
  20. 97
  21. 138
  22. 88
  23. 109
  24. 45
  25. 60
  26. 68
  27. 124
  28. 76
  29. 100
  30. 51
  31. 150
  32. 130
  33. 166
  34. 92
  35. 121
  36. 130
  37. 144
  38. 92
  39. 154
  40. 100

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