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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 573 · 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. 1.46 + 46 =
  2. 2.70 + 55 =
  3. 3.66 + 44 =
  4. 4.87 + 26 =
  5. 5.38 + 32 =
  6. 6.46 + 57 =
  7. 7.58 + 58 =
  8. 8.68 + 51 =
  9. 9.81 + 42 =
  10. 10.33 + 72 =
  11. 11.76 + 41 =
  12. 12.86 + 77 =
  13. 13.60 + 33 =
  14. 14.79 + 54 =
  15. 15.34 + 29 =
  16. 16.88 + 74 =
  17. 17.31 + 38 =
  18. 18.23 + 64 =
  19. 19.64 + 25 =
  20. 20.45 + 42 =
  21. 21.77 + 64 =
  22. 22.33 + 58 =
  23. 23.43 + 43 =
  24. 24.28 + 42 =
  25. 25.65 + 24 =
  26. 26.52 + 16 =
  27. 27.43 + 31 =
  28. 28.74 + 44 =
  29. 29.67 + 12 =
  30. 30.28 + 27 =
  31. 31.58 + 29 =
  32. 32.38 + 41 =
  33. 33.76 + 59 =
  34. 34.47 + 32 =
  35. 35.64 + 21 =
  36. 36.24 + 54 =
  37. 37.75 + 16 =
  38. 38.61 + 31 =
  39. 39.45 + 44 =
  40. 40.69 + 84 =

Answer key

  1. 92
  2. 125
  3. 110
  4. 113
  5. 70
  6. 103
  7. 116
  8. 119
  9. 123
  10. 105
  11. 117
  12. 163
  13. 93
  14. 133
  15. 63
  16. 162
  17. 69
  18. 87
  19. 89
  20. 87
  21. 141
  22. 91
  23. 86
  24. 70
  25. 89
  26. 68
  27. 74
  28. 118
  29. 79
  30. 55
  31. 87
  32. 79
  33. 135
  34. 79
  35. 85
  36. 78
  37. 91
  38. 92
  39. 89
  40. 153

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