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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 747 · 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. 1.58 + 55 =
  2. 2.41 + 77 =
  3. 3.50 + 84 =
  4. 4.22 + 67 =
  5. 5.74 + 16 =
  6. 6.48 + 88 =
  7. 7.33 + 81 =
  8. 8.89 + 16 =
  9. 9.24 + 76 =
  10. 10.38 + 88 =
  11. 11.25 + 17 =
  12. 12.70 + 87 =
  13. 13.27 + 78 =
  14. 14.81 + 12 =
  15. 15.68 + 35 =
  16. 16.89 + 18 =
  17. 17.28 + 61 =
  18. 18.71 + 45 =
  19. 19.67 + 26 =
  20. 20.46 + 29 =
  21. 21.82 + 29 =
  22. 22.41 + 39 =
  23. 23.35 + 63 =
  24. 24.22 + 23 =
  25. 25.22 + 62 =
  26. 26.67 + 13 =
  27. 27.73 + 39 =
  28. 28.60 + 15 =
  29. 29.28 + 43 =
  30. 30.51 + 54 =
  31. 31.31 + 82 =
  32. 32.53 + 59 =
  33. 33.23 + 58 =
  34. 34.83 + 72 =
  35. 35.35 + 73 =
  36. 36.26 + 43 =
  37. 37.42 + 71 =
  38. 38.25 + 44 =
  39. 39.60 + 83 =
  40. 40.42 + 73 =

Answer key

  1. 113
  2. 118
  3. 134
  4. 89
  5. 90
  6. 136
  7. 114
  8. 105
  9. 100
  10. 126
  11. 42
  12. 157
  13. 105
  14. 93
  15. 103
  16. 107
  17. 89
  18. 116
  19. 93
  20. 75
  21. 111
  22. 80
  23. 98
  24. 45
  25. 84
  26. 80
  27. 112
  28. 75
  29. 71
  30. 105
  31. 113
  32. 112
  33. 81
  34. 155
  35. 108
  36. 69
  37. 113
  38. 69
  39. 143
  40. 115

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