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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 462 · 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. 1.48 + 41 =
  2. 2.33 + 69 =
  3. 3.27 + 72 =
  4. 4.88 + 56 =
  5. 5.49 + 14 =
  6. 6.89 + 43 =
  7. 7.25 + 34 =
  8. 8.61 + 44 =
  9. 9.88 + 86 =
  10. 10.80 + 15 =
  11. 11.33 + 12 =
  12. 12.86 + 45 =
  13. 13.36 + 66 =
  14. 14.74 + 27 =
  15. 15.47 + 77 =
  16. 16.27 + 68 =
  17. 17.77 + 81 =
  18. 18.34 + 69 =
  19. 19.27 + 41 =
  20. 20.42 + 37 =
  21. 21.76 + 31 =
  22. 22.37 + 36 =
  23. 23.82 + 73 =
  24. 24.73 + 13 =
  25. 25.32 + 89 =
  26. 26.29 + 85 =
  27. 27.40 + 86 =
  28. 28.54 + 21 =
  29. 29.81 + 49 =
  30. 30.53 + 64 =
  31. 31.70 + 85 =
  32. 32.86 + 82 =
  33. 33.72 + 27 =
  34. 34.84 + 84 =
  35. 35.77 + 71 =
  36. 36.48 + 88 =
  37. 37.22 + 18 =
  38. 38.41 + 55 =
  39. 39.28 + 16 =
  40. 40.48 + 16 =

Answer key

  1. 89
  2. 102
  3. 99
  4. 144
  5. 63
  6. 132
  7. 59
  8. 105
  9. 174
  10. 95
  11. 45
  12. 131
  13. 102
  14. 101
  15. 124
  16. 95
  17. 158
  18. 103
  19. 68
  20. 79
  21. 107
  22. 73
  23. 155
  24. 86
  25. 121
  26. 114
  27. 126
  28. 75
  29. 130
  30. 117
  31. 155
  32. 168
  33. 99
  34. 168
  35. 148
  36. 136
  37. 40
  38. 96
  39. 44
  40. 64

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