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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 392 · 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. 1.26 + 64 =
  2. 2.72 + 19 =
  3. 3.68 + 72 =
  4. 4.66 + 54 =
  5. 5.58 + 69 =
  6. 6.33 + 46 =
  7. 7.37 + 88 =
  8. 8.45 + 33 =
  9. 9.34 + 85 =
  10. 10.21 + 78 =
  11. 11.29 + 81 =
  12. 12.87 + 24 =
  13. 13.69 + 37 =
  14. 14.80 + 21 =
  15. 15.65 + 16 =
  16. 16.63 + 73 =
  17. 17.47 + 56 =
  18. 18.54 + 38 =
  19. 19.69 + 16 =
  20. 20.83 + 88 =
  21. 21.36 + 45 =
  22. 22.28 + 29 =
  23. 23.85 + 43 =
  24. 24.81 + 34 =
  25. 25.54 + 85 =
  26. 26.35 + 39 =
  27. 27.47 + 59 =
  28. 28.66 + 24 =
  29. 29.62 + 69 =
  30. 30.34 + 28 =
  31. 31.85 + 45 =
  32. 32.21 + 83 =
  33. 33.39 + 33 =
  34. 34.43 + 87 =
  35. 35.69 + 25 =
  36. 36.34 + 21 =
  37. 37.64 + 35 =
  38. 38.76 + 49 =
  39. 39.43 + 88 =
  40. 40.59 + 31 =

Answer key

  1. 90
  2. 91
  3. 140
  4. 120
  5. 127
  6. 79
  7. 125
  8. 78
  9. 119
  10. 99
  11. 110
  12. 111
  13. 106
  14. 101
  15. 81
  16. 136
  17. 103
  18. 92
  19. 85
  20. 171
  21. 81
  22. 57
  23. 128
  24. 115
  25. 139
  26. 74
  27. 106
  28. 90
  29. 131
  30. 62
  31. 130
  32. 104
  33. 72
  34. 130
  35. 94
  36. 55
  37. 99
  38. 125
  39. 131
  40. 90

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