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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 43 · 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. 1.58 × 4 =
  2. 2.32 × 8 =
  3. 3.18 × 8 =
  4. 4.36 × 8 =
  5. 5.29 × 8 =
  6. 6.16 × 4 =
  7. 7.14 × 8 =
  8. 8.74 × 4 =
  9. 9.20 × 8 =
  10. 10.31 × 8 =
  11. 11.59 × 4 =
  12. 12.33 × 8 =
  13. 13.22 × 8 =
  14. 14.12 × 8 =
  15. 15.14 × 4 =
  16. 16.56 × 4 =
  17. 17.23 × 8 =
  18. 18.52 × 4 =
  19. 19.48 × 4 =
  20. 20.31 × 4 =
  21. 21.61 × 4 =
  22. 22.23 × 4 =
  23. 23.38 × 4 =
  24. 24.60 × 4 =
  25. 25.12 × 4 =
  26. 26.65 × 4 =
  27. 27.28 × 8 =
  28. 28.17 × 8 =
  29. 29.25 × 8 =
  30. 30.39 × 8 =
  31. 31.39 × 4 =
  32. 32.30 × 4 =
  33. 33.34 × 8 =
  34. 34.30 × 8 =
  35. 35.35 × 8 =
  36. 36.51 × 4 =
  37. 37.43 × 4 =
  38. 38.64 × 4 =
  39. 39.27 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 232
  2. 256
  3. 144
  4. 288
  5. 232
  6. 64
  7. 112
  8. 296
  9. 160
  10. 248
  11. 236
  12. 264
  13. 176
  14. 96
  15. 56
  16. 224
  17. 184
  18. 208
  19. 192
  20. 124
  21. 244
  22. 92
  23. 152
  24. 240
  25. 48
  26. 260
  27. 224
  28. 136
  29. 200
  30. 312
  31. 156
  32. 120
  33. 272
  34. 240
  35. 280
  36. 204
  37. 172
  38. 256
  39. 108
  40. 116

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