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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 153 · 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. 1.71 + 74 =
  2. 2.40 + 33 =
  3. 3.47 + 84 =
  4. 4.84 + 76 =
  5. 5.86 + 39 =
  6. 6.71 + 41 =
  7. 7.54 + 86 =
  8. 8.42 + 66 =
  9. 9.28 + 28 =
  10. 10.53 + 23 =
  11. 11.32 + 43 =
  12. 12.75 + 55 =
  13. 13.43 + 59 =
  14. 14.77 + 51 =
  15. 15.29 + 21 =
  16. 16.43 + 53 =
  17. 17.41 + 59 =
  18. 18.79 + 25 =
  19. 19.57 + 15 =
  20. 20.84 + 17 =
  21. 21.27 + 18 =
  22. 22.66 + 77 =
  23. 23.37 + 74 =
  24. 24.51 + 53 =
  25. 25.64 + 34 =
  26. 26.67 + 41 =
  27. 27.72 + 55 =
  28. 28.29 + 57 =
  29. 29.41 + 75 =
  30. 30.70 + 26 =
  31. 31.39 + 66 =
  32. 32.62 + 19 =
  33. 33.38 + 15 =
  34. 34.30 + 51 =
  35. 35.31 + 16 =
  36. 36.47 + 68 =
  37. 37.25 + 81 =
  38. 38.34 + 23 =
  39. 39.73 + 58 =
  40. 40.62 + 48 =

Answer key

  1. 145
  2. 73
  3. 131
  4. 160
  5. 125
  6. 112
  7. 140
  8. 108
  9. 56
  10. 76
  11. 75
  12. 130
  13. 102
  14. 128
  15. 50
  16. 96
  17. 100
  18. 104
  19. 72
  20. 101
  21. 45
  22. 143
  23. 111
  24. 104
  25. 98
  26. 108
  27. 127
  28. 86
  29. 116
  30. 96
  31. 105
  32. 81
  33. 53
  34. 81
  35. 47
  36. 115
  37. 106
  38. 57
  39. 131
  40. 110

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