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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 883 · 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. 1.66 + 12 =
  2. 2.30 + 17 =
  3. 3.44 + 47 =
  4. 4.57 + 81 =
  5. 5.44 + 69 =
  6. 6.80 + 64 =
  7. 7.33 + 71 =
  8. 8.71 + 74 =
  9. 9.44 + 21 =
  10. 10.82 + 22 =
  11. 11.54 + 61 =
  12. 12.43 + 31 =
  13. 13.45 + 36 =
  14. 14.88 + 55 =
  15. 15.27 + 32 =
  16. 16.28 + 51 =
  17. 17.72 + 81 =
  18. 18.53 + 38 =
  19. 19.44 + 14 =
  20. 20.41 + 14 =
  21. 21.33 + 35 =
  22. 22.82 + 45 =
  23. 23.38 + 87 =
  24. 24.76 + 89 =
  25. 25.22 + 15 =
  26. 26.25 + 51 =
  27. 27.78 + 42 =
  28. 28.43 + 29 =
  29. 29.58 + 66 =
  30. 30.30 + 61 =
  31. 31.47 + 51 =
  32. 32.47 + 16 =
  33. 33.59 + 23 =
  34. 34.83 + 22 =
  35. 35.45 + 43 =
  36. 36.81 + 64 =
  37. 37.62 + 82 =
  38. 38.66 + 49 =
  39. 39.70 + 77 =
  40. 40.81 + 88 =

Answer key

  1. 78
  2. 47
  3. 91
  4. 138
  5. 113
  6. 144
  7. 104
  8. 145
  9. 65
  10. 104
  11. 115
  12. 74
  13. 81
  14. 143
  15. 59
  16. 79
  17. 153
  18. 91
  19. 58
  20. 55
  21. 68
  22. 127
  23. 125
  24. 165
  25. 37
  26. 76
  27. 120
  28. 72
  29. 124
  30. 91
  31. 98
  32. 63
  33. 82
  34. 105
  35. 88
  36. 145
  37. 144
  38. 115
  39. 147
  40. 169

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