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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 724 · 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. 1.67 + 35 =
  2. 2.84 + 12 =
  3. 3.22 + 65 =
  4. 4.26 + 45 =
  5. 5.43 + 21 =
  6. 6.29 + 16 =
  7. 7.59 + 72 =
  8. 8.56 + 35 =
  9. 9.80 + 41 =
  10. 10.81 + 26 =
  11. 11.28 + 81 =
  12. 12.75 + 43 =
  13. 13.60 + 15 =
  14. 14.76 + 71 =
  15. 15.41 + 32 =
  16. 16.77 + 18 =
  17. 17.42 + 24 =
  18. 18.42 + 13 =
  19. 19.83 + 53 =
  20. 20.78 + 82 =
  21. 21.82 + 71 =
  22. 22.80 + 59 =
  23. 23.37 + 41 =
  24. 24.76 + 21 =
  25. 25.61 + 59 =
  26. 26.69 + 72 =
  27. 27.63 + 79 =
  28. 28.24 + 48 =
  29. 29.50 + 88 =
  30. 30.37 + 32 =
  31. 31.71 + 33 =
  32. 32.87 + 41 =
  33. 33.48 + 29 =
  34. 34.50 + 71 =
  35. 35.32 + 22 =
  36. 36.39 + 42 =
  37. 37.68 + 26 =
  38. 38.64 + 78 =
  39. 39.52 + 13 =
  40. 40.22 + 18 =

Answer key

  1. 102
  2. 96
  3. 87
  4. 71
  5. 64
  6. 45
  7. 131
  8. 91
  9. 121
  10. 107
  11. 109
  12. 118
  13. 75
  14. 147
  15. 73
  16. 95
  17. 66
  18. 55
  19. 136
  20. 160
  21. 153
  22. 139
  23. 78
  24. 97
  25. 120
  26. 141
  27. 142
  28. 72
  29. 138
  30. 69
  31. 104
  32. 128
  33. 77
  34. 121
  35. 54
  36. 81
  37. 94
  38. 142
  39. 65
  40. 40

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