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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 641 · 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. 1.76 + 79 =
  2. 2.88 + 13 =
  3. 3.77 + 72 =
  4. 4.71 + 53 =
  5. 5.43 + 84 =
  6. 6.41 + 22 =
  7. 7.21 + 63 =
  8. 8.77 + 83 =
  9. 9.59 + 61 =
  10. 10.74 + 31 =
  11. 11.52 + 31 =
  12. 12.41 + 66 =
  13. 13.30 + 17 =
  14. 14.50 + 81 =
  15. 15.26 + 12 =
  16. 16.40 + 53 =
  17. 17.63 + 31 =
  18. 18.23 + 71 =
  19. 19.84 + 83 =
  20. 20.53 + 47 =
  21. 21.80 + 52 =
  22. 22.34 + 16 =
  23. 23.34 + 81 =
  24. 24.32 + 31 =
  25. 25.35 + 72 =
  26. 26.26 + 41 =
  27. 27.29 + 37 =
  28. 28.66 + 73 =
  29. 29.87 + 27 =
  30. 30.66 + 51 =
  31. 31.41 + 89 =
  32. 32.30 + 26 =
  33. 33.43 + 17 =
  34. 34.24 + 69 =
  35. 35.26 + 53 =
  36. 36.22 + 59 =
  37. 37.68 + 69 =
  38. 38.23 + 69 =
  39. 39.53 + 41 =
  40. 40.63 + 85 =

Answer key

  1. 155
  2. 101
  3. 149
  4. 124
  5. 127
  6. 63
  7. 84
  8. 160
  9. 120
  10. 105
  11. 83
  12. 107
  13. 47
  14. 131
  15. 38
  16. 93
  17. 94
  18. 94
  19. 167
  20. 100
  21. 132
  22. 50
  23. 115
  24. 63
  25. 107
  26. 67
  27. 66
  28. 139
  29. 114
  30. 117
  31. 130
  32. 56
  33. 60
  34. 93
  35. 79
  36. 81
  37. 137
  38. 92
  39. 94
  40. 148

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