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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 731 · 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. 1.51 + 44 =
  2. 2.83 + 35 =
  3. 3.47 + 71 =
  4. 4.86 + 41 =
  5. 5.50 + 18 =
  6. 6.71 + 34 =
  7. 7.48 + 34 =
  8. 8.69 + 52 =
  9. 9.60 + 28 =
  10. 10.22 + 26 =
  11. 11.87 + 85 =
  12. 12.26 + 58 =
  13. 13.28 + 55 =
  14. 14.83 + 61 =
  15. 15.61 + 21 =
  16. 16.62 + 13 =
  17. 17.25 + 68 =
  18. 18.57 + 43 =
  19. 19.21 + 43 =
  20. 20.33 + 34 =
  21. 21.49 + 43 =
  22. 22.26 + 84 =
  23. 23.89 + 72 =
  24. 24.38 + 34 =
  25. 25.34 + 41 =
  26. 26.57 + 25 =
  27. 27.55 + 32 =
  28. 28.40 + 64 =
  29. 29.84 + 71 =
  30. 30.26 + 56 =
  31. 31.74 + 61 =
  32. 32.86 + 21 =
  33. 33.46 + 71 =
  34. 34.50 + 61 =
  35. 35.66 + 74 =
  36. 36.31 + 52 =
  37. 37.68 + 34 =
  38. 38.36 + 42 =
  39. 39.33 + 32 =
  40. 40.79 + 79 =

Answer key

  1. 95
  2. 118
  3. 118
  4. 127
  5. 68
  6. 105
  7. 82
  8. 121
  9. 88
  10. 48
  11. 172
  12. 84
  13. 83
  14. 144
  15. 82
  16. 75
  17. 93
  18. 100
  19. 64
  20. 67
  21. 92
  22. 110
  23. 161
  24. 72
  25. 75
  26. 82
  27. 87
  28. 104
  29. 155
  30. 82
  31. 135
  32. 107
  33. 117
  34. 111
  35. 140
  36. 83
  37. 102
  38. 78
  39. 65
  40. 158

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