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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 222 · 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 + 38 =
  2. 2.25 + 26 =
  3. 3.23 + 62 =
  4. 4.58 + 73 =
  5. 5.34 + 87 =
  6. 6.34 + 76 =
  7. 7.23 + 39 =
  8. 8.35 + 23 =
  9. 9.38 + 22 =
  10. 10.23 + 51 =
  11. 11.27 + 67 =
  12. 12.27 + 44 =
  13. 13.23 + 76 =
  14. 14.64 + 45 =
  15. 15.71 + 72 =
  16. 16.38 + 71 =
  17. 17.42 + 39 =
  18. 18.67 + 31 =
  19. 19.68 + 54 =
  20. 20.77 + 39 =
  21. 21.37 + 71 =
  22. 22.47 + 64 =
  23. 23.35 + 69 =
  24. 24.38 + 86 =
  25. 25.40 + 21 =
  26. 26.72 + 35 =
  27. 27.22 + 46 =
  28. 28.64 + 76 =
  29. 29.69 + 29 =
  30. 30.70 + 14 =
  31. 31.87 + 16 =
  32. 32.72 + 84 =
  33. 33.31 + 37 =
  34. 34.50 + 83 =
  35. 35.69 + 31 =
  36. 36.65 + 41 =
  37. 37.57 + 66 =
  38. 38.82 + 83 =
  39. 39.88 + 31 =
  40. 40.25 + 79 =

Answer key

  1. 123
  2. 51
  3. 85
  4. 131
  5. 121
  6. 110
  7. 62
  8. 58
  9. 60
  10. 74
  11. 94
  12. 71
  13. 99
  14. 109
  15. 143
  16. 109
  17. 81
  18. 98
  19. 122
  20. 116
  21. 108
  22. 111
  23. 104
  24. 124
  25. 61
  26. 107
  27. 68
  28. 140
  29. 98
  30. 84
  31. 103
  32. 156
  33. 68
  34. 133
  35. 100
  36. 106
  37. 123
  38. 165
  39. 119
  40. 104

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