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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 599 · 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. 1.42 + 75 =
  2. 2.36 + 81 =
  3. 3.70 + 87 =
  4. 4.22 + 67 =
  5. 5.56 + 48 =
  6. 6.22 + 65 =
  7. 7.81 + 69 =
  8. 8.42 + 57 =
  9. 9.73 + 89 =
  10. 10.42 + 12 =
  11. 11.74 + 18 =
  12. 12.82 + 74 =
  13. 13.53 + 61 =
  14. 14.36 + 55 =
  15. 15.38 + 65 =
  16. 16.59 + 72 =
  17. 17.88 + 81 =
  18. 18.82 + 23 =
  19. 19.40 + 17 =
  20. 20.75 + 28 =
  21. 21.32 + 71 =
  22. 22.46 + 26 =
  23. 23.48 + 18 =
  24. 24.34 + 21 =
  25. 25.77 + 82 =
  26. 26.70 + 28 =
  27. 27.81 + 34 =
  28. 28.21 + 24 =
  29. 29.56 + 25 =
  30. 30.55 + 53 =
  31. 31.38 + 61 =
  32. 32.43 + 29 =
  33. 33.70 + 62 =
  34. 34.29 + 35 =
  35. 35.35 + 48 =
  36. 36.85 + 87 =
  37. 37.25 + 78 =
  38. 38.61 + 24 =
  39. 39.24 + 59 =
  40. 40.40 + 79 =

Answer key

  1. 117
  2. 117
  3. 157
  4. 89
  5. 104
  6. 87
  7. 150
  8. 99
  9. 162
  10. 54
  11. 92
  12. 156
  13. 114
  14. 91
  15. 103
  16. 131
  17. 169
  18. 105
  19. 57
  20. 103
  21. 103
  22. 72
  23. 66
  24. 55
  25. 159
  26. 98
  27. 115
  28. 45
  29. 81
  30. 108
  31. 99
  32. 72
  33. 132
  34. 64
  35. 83
  36. 172
  37. 103
  38. 85
  39. 83
  40. 119

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