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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 585 · 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 + 81 =
  2. 2.29 + 81 =
  3. 3.88 + 81 =
  4. 4.80 + 15 =
  5. 5.55 + 29 =
  6. 6.35 + 14 =
  7. 7.50 + 73 =
  8. 8.21 + 77 =
  9. 9.24 + 83 =
  10. 10.68 + 56 =
  11. 11.54 + 81 =
  12. 12.85 + 33 =
  13. 13.67 + 47 =
  14. 14.31 + 65 =
  15. 15.59 + 43 =
  16. 16.27 + 52 =
  17. 17.26 + 59 =
  18. 18.21 + 18 =
  19. 19.21 + 71 =
  20. 20.30 + 22 =
  21. 21.86 + 49 =
  22. 22.83 + 83 =
  23. 23.27 + 44 =
  24. 24.48 + 62 =
  25. 25.82 + 41 =
  26. 26.77 + 44 =
  27. 27.38 + 73 =
  28. 28.31 + 72 =
  29. 29.43 + 12 =
  30. 30.45 + 16 =
  31. 31.66 + 54 =
  32. 32.42 + 26 =
  33. 33.40 + 55 =
  34. 34.54 + 12 =
  35. 35.22 + 23 =
  36. 36.44 + 17 =
  37. 37.24 + 37 =
  38. 38.70 + 78 =
  39. 39.37 + 51 =
  40. 40.83 + 28 =

Answer key

  1. 142
  2. 110
  3. 169
  4. 95
  5. 84
  6. 49
  7. 123
  8. 98
  9. 107
  10. 124
  11. 135
  12. 118
  13. 114
  14. 96
  15. 102
  16. 79
  17. 85
  18. 39
  19. 92
  20. 52
  21. 135
  22. 166
  23. 71
  24. 110
  25. 123
  26. 121
  27. 111
  28. 103
  29. 55
  30. 61
  31. 120
  32. 68
  33. 95
  34. 66
  35. 45
  36. 61
  37. 61
  38. 148
  39. 88
  40. 111

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