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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 469 · 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. 1.30 + 81 =
  2. 2.77 + 88 =
  3. 3.70 + 49 =
  4. 4.64 + 62 =
  5. 5.44 + 68 =
  6. 6.33 + 51 =
  7. 7.47 + 45 =
  8. 8.58 + 41 =
  9. 9.45 + 39 =
  10. 10.57 + 39 =
  11. 11.39 + 47 =
  12. 12.66 + 71 =
  13. 13.33 + 58 =
  14. 14.87 + 51 =
  15. 15.27 + 72 =
  16. 16.30 + 37 =
  17. 17.50 + 66 =
  18. 18.31 + 31 =
  19. 19.50 + 65 =
  20. 20.33 + 71 =
  21. 21.56 + 61 =
  22. 22.29 + 34 =
  23. 23.76 + 77 =
  24. 24.38 + 71 =
  25. 25.37 + 34 =
  26. 26.56 + 29 =
  27. 27.82 + 83 =
  28. 28.45 + 54 =
  29. 29.42 + 27 =
  30. 30.48 + 78 =
  31. 31.71 + 89 =
  32. 32.38 + 81 =
  33. 33.76 + 25 =
  34. 34.81 + 63 =
  35. 35.75 + 68 =
  36. 36.69 + 81 =
  37. 37.26 + 12 =
  38. 38.85 + 34 =
  39. 39.51 + 21 =
  40. 40.60 + 32 =

Answer key

  1. 111
  2. 165
  3. 119
  4. 126
  5. 112
  6. 84
  7. 92
  8. 99
  9. 84
  10. 96
  11. 86
  12. 137
  13. 91
  14. 138
  15. 99
  16. 67
  17. 116
  18. 62
  19. 115
  20. 104
  21. 117
  22. 63
  23. 153
  24. 109
  25. 71
  26. 85
  27. 165
  28. 99
  29. 69
  30. 126
  31. 160
  32. 119
  33. 101
  34. 144
  35. 143
  36. 150
  37. 38
  38. 119
  39. 72
  40. 92

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