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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 780 · 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 + 76 =
  2. 2.88 + 69 =
  3. 3.40 + 71 =
  4. 4.83 + 71 =
  5. 5.70 + 88 =
  6. 6.36 + 41 =
  7. 7.68 + 32 =
  8. 8.25 + 12 =
  9. 9.89 + 71 =
  10. 10.81 + 23 =
  11. 11.57 + 24 =
  12. 12.48 + 75 =
  13. 13.81 + 29 =
  14. 14.50 + 28 =
  15. 15.73 + 73 =
  16. 16.60 + 31 =
  17. 17.73 + 43 =
  18. 18.46 + 81 =
  19. 19.67 + 15 =
  20. 20.72 + 14 =
  21. 21.68 + 49 =
  22. 22.34 + 44 =
  23. 23.72 + 37 =
  24. 24.36 + 27 =
  25. 25.47 + 46 =
  26. 26.89 + 81 =
  27. 27.59 + 69 =
  28. 28.78 + 19 =
  29. 29.45 + 18 =
  30. 30.28 + 66 =
  31. 31.33 + 49 =
  32. 32.27 + 43 =
  33. 33.22 + 14 =
  34. 34.65 + 48 =
  35. 35.62 + 24 =
  36. 36.71 + 34 =
  37. 37.29 + 28 =
  38. 38.85 + 63 =
  39. 39.52 + 35 =
  40. 40.66 + 58 =

Answer key

  1. 152
  2. 157
  3. 111
  4. 154
  5. 158
  6. 77
  7. 100
  8. 37
  9. 160
  10. 104
  11. 81
  12. 123
  13. 110
  14. 78
  15. 146
  16. 91
  17. 116
  18. 127
  19. 82
  20. 86
  21. 117
  22. 78
  23. 109
  24. 63
  25. 93
  26. 170
  27. 128
  28. 97
  29. 63
  30. 94
  31. 82
  32. 70
  33. 36
  34. 113
  35. 86
  36. 105
  37. 57
  38. 148
  39. 87
  40. 124

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