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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 10 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.30 × 8 =
  2. 2.21 × 4 =
  3. 3.19 × 4 =
  4. 4.71 × 4 =
  5. 5.24 × 8 =
  6. 6.28 × 8 =
  7. 7.67 × 4 =
  8. 8.46 × 4 =
  9. 9.29 × 4 =
  10. 10.18 × 8 =
  11. 11.40 × 4 =
  12. 12.25 × 8 =
  13. 13.14 × 4 =
  14. 14.65 × 4 =
  15. 15.15 × 4 =
  16. 16.25 × 4 =
  17. 17.14 × 8 =
  18. 18.33 × 4 =
  19. 19.29 × 8 =
  20. 20.49 × 4 =
  21. 21.17 × 8 =
  22. 22.31 × 8 =
  23. 23.31 × 4 =
  24. 24.20 × 8 =
  25. 25.16 × 8 =
  26. 26.23 × 4 =
  27. 27.37 × 8 =
  28. 28.32 × 8 =
  29. 29.22 × 4 =
  30. 30.16 × 4 =
  31. 31.74 × 4 =
  32. 32.33 × 8 =
  33. 33.37 × 4 =
  34. 34.72 × 4 =
  35. 35.58 × 4 =
  36. 36.75 × 4 =
  37. 37.39 × 8 =
  38. 38.68 × 4 =
  39. 39.30 × 4 =
  40. 40.38 × 8 =

Answer key

  1. 240
  2. 84
  3. 76
  4. 284
  5. 192
  6. 224
  7. 268
  8. 184
  9. 116
  10. 144
  11. 160
  12. 200
  13. 56
  14. 260
  15. 60
  16. 100
  17. 112
  18. 132
  19. 232
  20. 196
  21. 136
  22. 248
  23. 124
  24. 160
  25. 128
  26. 92
  27. 296
  28. 256
  29. 88
  30. 64
  31. 296
  32. 264
  33. 148
  34. 288
  35. 232
  36. 300
  37. 312
  38. 272
  39. 120
  40. 304

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