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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 782 · 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. 1.76 + 14 =
  2. 2.57 + 71 =
  3. 3.33 + 45 =
  4. 4.30 + 72 =
  5. 5.88 + 32 =
  6. 6.50 + 57 =
  7. 7.69 + 88 =
  8. 8.22 + 24 =
  9. 9.61 + 18 =
  10. 10.62 + 39 =
  11. 11.60 + 83 =
  12. 12.58 + 21 =
  13. 13.41 + 51 =
  14. 14.66 + 21 =
  15. 15.25 + 34 =
  16. 16.47 + 52 =
  17. 17.34 + 83 =
  18. 18.30 + 85 =
  19. 19.69 + 22 =
  20. 20.68 + 34 =
  21. 21.75 + 49 =
  22. 22.78 + 71 =
  23. 23.36 + 66 =
  24. 24.36 + 28 =
  25. 25.81 + 31 =
  26. 26.36 + 58 =
  27. 27.72 + 61 =
  28. 28.47 + 45 =
  29. 29.48 + 36 =
  30. 30.41 + 41 =
  31. 31.53 + 89 =
  32. 32.32 + 37 =
  33. 33.65 + 13 =
  34. 34.33 + 79 =
  35. 35.63 + 19 =
  36. 36.44 + 31 =
  37. 37.37 + 72 =
  38. 38.50 + 86 =
  39. 39.54 + 82 =
  40. 40.67 + 66 =

Answer key

  1. 90
  2. 128
  3. 78
  4. 102
  5. 120
  6. 107
  7. 157
  8. 46
  9. 79
  10. 101
  11. 143
  12. 79
  13. 92
  14. 87
  15. 59
  16. 99
  17. 117
  18. 115
  19. 91
  20. 102
  21. 124
  22. 149
  23. 102
  24. 64
  25. 112
  26. 94
  27. 133
  28. 92
  29. 84
  30. 82
  31. 142
  32. 69
  33. 78
  34. 112
  35. 82
  36. 75
  37. 109
  38. 136
  39. 136
  40. 133

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