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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 306 · 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. 1.48 + 86 =
  2. 2.64 + 71 =
  3. 3.23 + 22 =
  4. 4.50 + 68 =
  5. 5.42 + 41 =
  6. 6.75 + 18 =
  7. 7.37 + 85 =
  8. 8.56 + 76 =
  9. 9.65 + 34 =
  10. 10.49 + 16 =
  11. 11.30 + 13 =
  12. 12.30 + 79 =
  13. 13.43 + 74 =
  14. 14.80 + 23 =
  15. 15.40 + 34 =
  16. 16.43 + 62 =
  17. 17.49 + 62 =
  18. 18.45 + 72 =
  19. 19.36 + 76 =
  20. 20.38 + 67 =
  21. 21.43 + 79 =
  22. 22.85 + 32 =
  23. 23.26 + 61 =
  24. 24.57 + 31 =
  25. 25.38 + 84 =
  26. 26.24 + 88 =
  27. 27.72 + 73 =
  28. 28.77 + 66 =
  29. 29.21 + 12 =
  30. 30.21 + 78 =
  31. 31.72 + 31 =
  32. 32.85 + 16 =
  33. 33.57 + 73 =
  34. 34.49 + 45 =
  35. 35.30 + 39 =
  36. 36.83 + 71 =
  37. 37.50 + 58 =
  38. 38.67 + 61 =
  39. 39.59 + 31 =
  40. 40.69 + 83 =

Answer key

  1. 134
  2. 135
  3. 45
  4. 118
  5. 83
  6. 93
  7. 122
  8. 132
  9. 99
  10. 65
  11. 43
  12. 109
  13. 117
  14. 103
  15. 74
  16. 105
  17. 111
  18. 117
  19. 112
  20. 105
  21. 122
  22. 117
  23. 87
  24. 88
  25. 122
  26. 112
  27. 145
  28. 143
  29. 33
  30. 99
  31. 103
  32. 101
  33. 130
  34. 94
  35. 69
  36. 154
  37. 108
  38. 128
  39. 90
  40. 152

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