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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 620 · 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. 1.37 + 52 =
  2. 2.26 + 85 =
  3. 3.28 + 17 =
  4. 4.86 + 48 =
  5. 5.23 + 19 =
  6. 6.60 + 37 =
  7. 7.74 + 26 =
  8. 8.82 + 77 =
  9. 9.35 + 79 =
  10. 10.77 + 72 =
  11. 11.35 + 19 =
  12. 12.85 + 24 =
  13. 13.75 + 12 =
  14. 14.65 + 84 =
  15. 15.73 + 51 =
  16. 16.76 + 35 =
  17. 17.64 + 31 =
  18. 18.30 + 38 =
  19. 19.33 + 16 =
  20. 20.63 + 46 =
  21. 21.36 + 13 =
  22. 22.63 + 88 =
  23. 23.50 + 43 =
  24. 24.27 + 68 =
  25. 25.69 + 34 =
  26. 26.36 + 26 =
  27. 27.22 + 39 =
  28. 28.60 + 39 =
  29. 29.68 + 88 =
  30. 30.85 + 21 =
  31. 31.47 + 47 =
  32. 32.36 + 24 =
  33. 33.78 + 82 =
  34. 34.88 + 46 =
  35. 35.82 + 24 =
  36. 36.60 + 18 =
  37. 37.78 + 16 =
  38. 38.73 + 55 =
  39. 39.45 + 71 =
  40. 40.86 + 54 =

Answer key

  1. 89
  2. 111
  3. 45
  4. 134
  5. 42
  6. 97
  7. 100
  8. 159
  9. 114
  10. 149
  11. 54
  12. 109
  13. 87
  14. 149
  15. 124
  16. 111
  17. 95
  18. 68
  19. 49
  20. 109
  21. 49
  22. 151
  23. 93
  24. 95
  25. 103
  26. 62
  27. 61
  28. 99
  29. 156
  30. 106
  31. 94
  32. 60
  33. 160
  34. 134
  35. 106
  36. 78
  37. 94
  38. 128
  39. 116
  40. 140

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