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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 995 · 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. 1.89 + 31 =
  2. 2.71 + 33 =
  3. 3.34 + 42 =
  4. 4.38 + 67 =
  5. 5.81 + 83 =
  6. 6.89 + 35 =
  7. 7.40 + 62 =
  8. 8.53 + 69 =
  9. 9.64 + 48 =
  10. 10.84 + 81 =
  11. 11.74 + 41 =
  12. 12.50 + 37 =
  13. 13.28 + 66 =
  14. 14.52 + 29 =
  15. 15.29 + 66 =
  16. 16.45 + 51 =
  17. 17.54 + 71 =
  18. 18.49 + 14 =
  19. 19.71 + 21 =
  20. 20.35 + 72 =
  21. 21.22 + 14 =
  22. 22.38 + 23 =
  23. 23.81 + 74 =
  24. 24.79 + 74 =
  25. 25.67 + 56 =
  26. 26.25 + 47 =
  27. 27.34 + 25 =
  28. 28.44 + 15 =
  29. 29.29 + 52 =
  30. 30.53 + 27 =
  31. 31.51 + 55 =
  32. 32.22 + 31 =
  33. 33.69 + 65 =
  34. 34.74 + 51 =
  35. 35.25 + 82 =
  36. 36.40 + 43 =
  37. 37.87 + 81 =
  38. 38.76 + 28 =
  39. 39.52 + 12 =
  40. 40.69 + 35 =

Answer key

  1. 120
  2. 104
  3. 76
  4. 105
  5. 164
  6. 124
  7. 102
  8. 122
  9. 112
  10. 165
  11. 115
  12. 87
  13. 94
  14. 81
  15. 95
  16. 96
  17. 125
  18. 63
  19. 92
  20. 107
  21. 36
  22. 61
  23. 155
  24. 153
  25. 123
  26. 72
  27. 59
  28. 59
  29. 81
  30. 80
  31. 106
  32. 53
  33. 134
  34. 125
  35. 107
  36. 83
  37. 168
  38. 104
  39. 64
  40. 104

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