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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 477 · 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. 1.40 + 29 =
  2. 2.24 + 42 =
  3. 3.32 + 14 =
  4. 4.23 + 17 =
  5. 5.70 + 24 =
  6. 6.80 + 73 =
  7. 7.54 + 38 =
  8. 8.28 + 43 =
  9. 9.34 + 22 =
  10. 10.83 + 15 =
  11. 11.56 + 71 =
  12. 12.26 + 86 =
  13. 13.54 + 17 =
  14. 14.80 + 36 =
  15. 15.36 + 61 =
  16. 16.30 + 55 =
  17. 17.75 + 12 =
  18. 18.62 + 39 =
  19. 19.71 + 54 =
  20. 20.40 + 71 =
  21. 21.49 + 69 =
  22. 22.52 + 88 =
  23. 23.52 + 76 =
  24. 24.78 + 68 =
  25. 25.42 + 36 =
  26. 26.50 + 43 =
  27. 27.53 + 57 =
  28. 28.70 + 16 =
  29. 29.78 + 26 =
  30. 30.34 + 66 =
  31. 31.35 + 55 =
  32. 32.67 + 45 =
  33. 33.28 + 35 =
  34. 34.38 + 67 =
  35. 35.32 + 36 =
  36. 36.51 + 66 =
  37. 37.23 + 56 =
  38. 38.73 + 21 =
  39. 39.35 + 75 =
  40. 40.69 + 41 =

Answer key

  1. 69
  2. 66
  3. 46
  4. 40
  5. 94
  6. 153
  7. 92
  8. 71
  9. 56
  10. 98
  11. 127
  12. 112
  13. 71
  14. 116
  15. 97
  16. 85
  17. 87
  18. 101
  19. 125
  20. 111
  21. 118
  22. 140
  23. 128
  24. 146
  25. 78
  26. 93
  27. 110
  28. 86
  29. 104
  30. 100
  31. 90
  32. 112
  33. 63
  34. 105
  35. 68
  36. 117
  37. 79
  38. 94
  39. 110
  40. 110

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