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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 752 · 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. 1.61 + 19 =
  2. 2.25 + 19 =
  3. 3.29 + 13 =
  4. 4.79 + 38 =
  5. 5.42 + 24 =
  6. 6.22 + 19 =
  7. 7.78 + 61 =
  8. 8.22 + 41 =
  9. 9.59 + 84 =
  10. 10.41 + 31 =
  11. 11.27 + 61 =
  12. 12.84 + 25 =
  13. 13.69 + 45 =
  14. 14.23 + 27 =
  15. 15.41 + 75 =
  16. 16.48 + 42 =
  17. 17.26 + 25 =
  18. 18.76 + 61 =
  19. 19.86 + 22 =
  20. 20.30 + 53 =
  21. 21.72 + 54 =
  22. 22.69 + 52 =
  23. 23.43 + 29 =
  24. 24.27 + 88 =
  25. 25.58 + 13 =
  26. 26.78 + 58 =
  27. 27.77 + 71 =
  28. 28.29 + 27 =
  29. 29.41 + 14 =
  30. 30.40 + 77 =
  31. 31.50 + 25 =
  32. 32.40 + 35 =
  33. 33.61 + 51 =
  34. 34.56 + 66 =
  35. 35.80 + 19 =
  36. 36.43 + 79 =
  37. 37.60 + 31 =
  38. 38.52 + 78 =
  39. 39.50 + 64 =
  40. 40.43 + 45 =

Answer key

  1. 80
  2. 44
  3. 42
  4. 117
  5. 66
  6. 41
  7. 139
  8. 63
  9. 143
  10. 72
  11. 88
  12. 109
  13. 114
  14. 50
  15. 116
  16. 90
  17. 51
  18. 137
  19. 108
  20. 83
  21. 126
  22. 121
  23. 72
  24. 115
  25. 71
  26. 136
  27. 148
  28. 56
  29. 55
  30. 117
  31. 75
  32. 75
  33. 112
  34. 122
  35. 99
  36. 122
  37. 91
  38. 130
  39. 114
  40. 88

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