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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 291 · 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. 1.44 + 81 =
  2. 2.28 + 71 =
  3. 3.62 + 48 =
  4. 4.40 + 32 =
  5. 5.76 + 87 =
  6. 6.32 + 23 =
  7. 7.60 + 67 =
  8. 8.33 + 21 =
  9. 9.36 + 72 =
  10. 10.86 + 84 =
  11. 11.36 + 28 =
  12. 12.82 + 81 =
  13. 13.33 + 39 =
  14. 14.57 + 66 =
  15. 15.58 + 79 =
  16. 16.29 + 82 =
  17. 17.76 + 53 =
  18. 18.60 + 31 =
  19. 19.67 + 85 =
  20. 20.27 + 45 =
  21. 21.42 + 81 =
  22. 22.32 + 61 =
  23. 23.33 + 49 =
  24. 24.53 + 59 =
  25. 25.86 + 15 =
  26. 26.28 + 51 =
  27. 27.71 + 14 =
  28. 28.39 + 61 =
  29. 29.41 + 89 =
  30. 30.44 + 51 =
  31. 31.43 + 29 =
  32. 32.34 + 29 =
  33. 33.82 + 36 =
  34. 34.61 + 63 =
  35. 35.42 + 56 =
  36. 36.32 + 31 =
  37. 37.58 + 21 =
  38. 38.43 + 86 =
  39. 39.21 + 47 =
  40. 40.68 + 33 =

Answer key

  1. 125
  2. 99
  3. 110
  4. 72
  5. 163
  6. 55
  7. 127
  8. 54
  9. 108
  10. 170
  11. 64
  12. 163
  13. 72
  14. 123
  15. 137
  16. 111
  17. 129
  18. 91
  19. 152
  20. 72
  21. 123
  22. 93
  23. 82
  24. 112
  25. 101
  26. 79
  27. 85
  28. 100
  29. 130
  30. 95
  31. 72
  32. 63
  33. 118
  34. 124
  35. 98
  36. 63
  37. 79
  38. 129
  39. 68
  40. 101

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