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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 763 · 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. 1.56 + 31 =
  2. 2.29 + 39 =
  3. 3.51 + 47 =
  4. 4.70 + 14 =
  5. 5.77 + 72 =
  6. 6.37 + 25 =
  7. 7.76 + 82 =
  8. 8.27 + 67 =
  9. 9.75 + 33 =
  10. 10.44 + 15 =
  11. 11.64 + 23 =
  12. 12.84 + 39 =
  13. 13.40 + 55 =
  14. 14.59 + 56 =
  15. 15.41 + 66 =
  16. 16.36 + 81 =
  17. 17.26 + 62 =
  18. 18.67 + 57 =
  19. 19.31 + 27 =
  20. 20.24 + 81 =
  21. 21.79 + 27 =
  22. 22.22 + 58 =
  23. 23.88 + 64 =
  24. 24.31 + 31 =
  25. 25.23 + 51 =
  26. 26.40 + 59 =
  27. 27.34 + 61 =
  28. 28.25 + 31 =
  29. 29.72 + 85 =
  30. 30.37 + 49 =
  31. 31.63 + 15 =
  32. 32.34 + 53 =
  33. 33.72 + 24 =
  34. 34.47 + 12 =
  35. 35.68 + 15 =
  36. 36.27 + 74 =
  37. 37.36 + 61 =
  38. 38.50 + 21 =
  39. 39.22 + 46 =
  40. 40.30 + 44 =

Answer key

  1. 87
  2. 68
  3. 98
  4. 84
  5. 149
  6. 62
  7. 158
  8. 94
  9. 108
  10. 59
  11. 87
  12. 123
  13. 95
  14. 115
  15. 107
  16. 117
  17. 88
  18. 124
  19. 58
  20. 105
  21. 106
  22. 80
  23. 152
  24. 62
  25. 74
  26. 99
  27. 95
  28. 56
  29. 157
  30. 86
  31. 78
  32. 87
  33. 96
  34. 59
  35. 83
  36. 101
  37. 97
  38. 71
  39. 68
  40. 74

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