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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 716 · 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. 1.33 + 52 =
  2. 2.43 + 21 =
  3. 3.68 + 32 =
  4. 4.72 + 39 =
  5. 5.33 + 33 =
  6. 6.88 + 28 =
  7. 7.88 + 29 =
  8. 8.86 + 23 =
  9. 9.53 + 27 =
  10. 10.72 + 43 =
  11. 11.75 + 18 =
  12. 12.21 + 27 =
  13. 13.23 + 82 =
  14. 14.28 + 47 =
  15. 15.63 + 85 =
  16. 16.47 + 47 =
  17. 17.40 + 31 =
  18. 18.73 + 76 =
  19. 19.77 + 53 =
  20. 20.77 + 18 =
  21. 21.85 + 28 =
  22. 22.88 + 67 =
  23. 23.41 + 77 =
  24. 24.36 + 72 =
  25. 25.34 + 44 =
  26. 26.32 + 26 =
  27. 27.73 + 32 =
  28. 28.62 + 53 =
  29. 29.26 + 23 =
  30. 30.55 + 54 =
  31. 31.59 + 51 =
  32. 32.44 + 22 =
  33. 33.51 + 15 =
  34. 34.68 + 38 =
  35. 35.70 + 79 =
  36. 36.65 + 61 =
  37. 37.27 + 59 =
  38. 38.56 + 12 =
  39. 39.55 + 47 =
  40. 40.43 + 51 =

Answer key

  1. 85
  2. 64
  3. 100
  4. 111
  5. 66
  6. 116
  7. 117
  8. 109
  9. 80
  10. 115
  11. 93
  12. 48
  13. 105
  14. 75
  15. 148
  16. 94
  17. 71
  18. 149
  19. 130
  20. 95
  21. 113
  22. 155
  23. 118
  24. 108
  25. 78
  26. 58
  27. 105
  28. 115
  29. 49
  30. 109
  31. 110
  32. 66
  33. 66
  34. 106
  35. 149
  36. 126
  37. 86
  38. 68
  39. 102
  40. 94

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