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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 247 · 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. 1.64 + 66 =
  2. 2.42 + 15 =
  3. 3.24 + 49 =
  4. 4.89 + 44 =
  5. 5.74 + 85 =
  6. 6.49 + 18 =
  7. 7.36 + 87 =
  8. 8.82 + 23 =
  9. 9.64 + 25 =
  10. 10.49 + 29 =
  11. 11.89 + 24 =
  12. 12.49 + 41 =
  13. 13.52 + 43 =
  14. 14.64 + 43 =
  15. 15.80 + 69 =
  16. 16.80 + 46 =
  17. 17.30 + 29 =
  18. 18.30 + 31 =
  19. 19.25 + 42 =
  20. 20.83 + 22 =
  21. 21.72 + 27 =
  22. 22.72 + 17 =
  23. 23.31 + 88 =
  24. 24.56 + 27 =
  25. 25.64 + 36 =
  26. 26.27 + 78 =
  27. 27.69 + 32 =
  28. 28.59 + 61 =
  29. 29.54 + 73 =
  30. 30.86 + 74 =
  31. 31.36 + 12 =
  32. 32.43 + 58 =
  33. 33.79 + 29 =
  34. 34.73 + 37 =
  35. 35.75 + 77 =
  36. 36.55 + 71 =
  37. 37.40 + 21 =
  38. 38.63 + 16 =
  39. 39.50 + 84 =
  40. 40.76 + 21 =

Answer key

  1. 130
  2. 57
  3. 73
  4. 133
  5. 159
  6. 67
  7. 123
  8. 105
  9. 89
  10. 78
  11. 113
  12. 90
  13. 95
  14. 107
  15. 149
  16. 126
  17. 59
  18. 61
  19. 67
  20. 105
  21. 99
  22. 89
  23. 119
  24. 83
  25. 100
  26. 105
  27. 101
  28. 120
  29. 127
  30. 160
  31. 48
  32. 101
  33. 108
  34. 110
  35. 152
  36. 126
  37. 61
  38. 79
  39. 134
  40. 97

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