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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 828 · 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. 1.80 + 49 =
  2. 2.86 + 78 =
  3. 3.63 + 38 =
  4. 4.43 + 18 =
  5. 5.69 + 51 =
  6. 6.22 + 75 =
  7. 7.21 + 28 =
  8. 8.72 + 13 =
  9. 9.75 + 16 =
  10. 10.73 + 32 =
  11. 11.25 + 81 =
  12. 12.32 + 17 =
  13. 13.46 + 39 =
  14. 14.67 + 84 =
  15. 15.54 + 51 =
  16. 16.29 + 18 =
  17. 17.45 + 46 =
  18. 18.23 + 12 =
  19. 19.78 + 61 =
  20. 20.35 + 23 =
  21. 21.32 + 88 =
  22. 22.24 + 71 =
  23. 23.55 + 59 =
  24. 24.41 + 71 =
  25. 25.26 + 52 =
  26. 26.38 + 78 =
  27. 27.67 + 51 =
  28. 28.42 + 84 =
  29. 29.70 + 23 =
  30. 30.23 + 31 =
  31. 31.81 + 21 =
  32. 32.86 + 51 =
  33. 33.74 + 35 =
  34. 34.39 + 22 =
  35. 35.33 + 12 =
  36. 36.69 + 32 =
  37. 37.33 + 69 =
  38. 38.47 + 53 =
  39. 39.40 + 53 =
  40. 40.72 + 12 =

Answer key

  1. 129
  2. 164
  3. 101
  4. 61
  5. 120
  6. 97
  7. 49
  8. 85
  9. 91
  10. 105
  11. 106
  12. 49
  13. 85
  14. 151
  15. 105
  16. 47
  17. 91
  18. 35
  19. 139
  20. 58
  21. 120
  22. 95
  23. 114
  24. 112
  25. 78
  26. 116
  27. 118
  28. 126
  29. 93
  30. 54
  31. 102
  32. 137
  33. 109
  34. 61
  35. 45
  36. 101
  37. 102
  38. 100
  39. 93
  40. 84

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