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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 397 · 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. 1.77 + 85 =
  2. 2.76 + 57 =
  3. 3.40 + 17 =
  4. 4.28 + 16 =
  5. 5.59 + 55 =
  6. 6.42 + 43 =
  7. 7.56 + 55 =
  8. 8.40 + 21 =
  9. 9.59 + 31 =
  10. 10.38 + 81 =
  11. 11.86 + 25 =
  12. 12.54 + 15 =
  13. 13.69 + 57 =
  14. 14.77 + 65 =
  15. 15.21 + 48 =
  16. 16.73 + 16 =
  17. 17.56 + 45 =
  18. 18.37 + 36 =
  19. 19.58 + 46 =
  20. 20.47 + 56 =
  21. 21.87 + 34 =
  22. 22.40 + 31 =
  23. 23.22 + 44 =
  24. 24.75 + 41 =
  25. 25.85 + 22 =
  26. 26.52 + 31 =
  27. 27.86 + 43 =
  28. 28.87 + 41 =
  29. 29.50 + 42 =
  30. 30.63 + 25 =
  31. 31.45 + 25 =
  32. 32.64 + 28 =
  33. 33.25 + 89 =
  34. 34.74 + 18 =
  35. 35.29 + 63 =
  36. 36.45 + 27 =
  37. 37.42 + 69 =
  38. 38.29 + 62 =
  39. 39.80 + 19 =
  40. 40.73 + 64 =

Answer key

  1. 162
  2. 133
  3. 57
  4. 44
  5. 114
  6. 85
  7. 111
  8. 61
  9. 90
  10. 119
  11. 111
  12. 69
  13. 126
  14. 142
  15. 69
  16. 89
  17. 101
  18. 73
  19. 104
  20. 103
  21. 121
  22. 71
  23. 66
  24. 116
  25. 107
  26. 83
  27. 129
  28. 128
  29. 92
  30. 88
  31. 70
  32. 92
  33. 114
  34. 92
  35. 92
  36. 72
  37. 111
  38. 91
  39. 99
  40. 137

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