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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 479 · 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. 1.40 + 51 =
  2. 2.86 + 73 =
  3. 3.30 + 28 =
  4. 4.56 + 43 =
  5. 5.29 + 48 =
  6. 6.74 + 77 =
  7. 7.67 + 39 =
  8. 8.27 + 21 =
  9. 9.36 + 82 =
  10. 10.59 + 43 =
  11. 11.41 + 71 =
  12. 12.84 + 63 =
  13. 13.65 + 48 =
  14. 14.27 + 16 =
  15. 15.24 + 59 =
  16. 16.40 + 71 =
  17. 17.29 + 21 =
  18. 18.60 + 56 =
  19. 19.44 + 34 =
  20. 20.43 + 29 =
  21. 21.72 + 25 =
  22. 22.63 + 31 =
  23. 23.54 + 56 =
  24. 24.70 + 19 =
  25. 25.42 + 41 =
  26. 26.73 + 32 =
  27. 27.46 + 85 =
  28. 28.21 + 87 =
  29. 29.84 + 64 =
  30. 30.22 + 58 =
  31. 31.78 + 76 =
  32. 32.36 + 21 =
  33. 33.79 + 51 =
  34. 34.27 + 35 =
  35. 35.48 + 38 =
  36. 36.50 + 53 =
  37. 37.58 + 37 =
  38. 38.65 + 17 =
  39. 39.70 + 16 =
  40. 40.29 + 17 =

Answer key

  1. 91
  2. 159
  3. 58
  4. 99
  5. 77
  6. 151
  7. 106
  8. 48
  9. 118
  10. 102
  11. 112
  12. 147
  13. 113
  14. 43
  15. 83
  16. 111
  17. 50
  18. 116
  19. 78
  20. 72
  21. 97
  22. 94
  23. 110
  24. 89
  25. 83
  26. 105
  27. 131
  28. 108
  29. 148
  30. 80
  31. 154
  32. 57
  33. 130
  34. 62
  35. 86
  36. 103
  37. 95
  38. 82
  39. 86
  40. 46

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