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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 661 · 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. 1.63 × 4 =
  2. 2.46 × 4 =
  3. 3.23 × 8 =
  4. 4.60 × 4 =
  5. 5.72 × 4 =
  6. 6.68 × 4 =
  7. 7.15 × 4 =
  8. 8.12 × 8 =
  9. 9.30 × 8 =
  10. 10.16 × 4 =
  11. 11.25 × 8 =
  12. 12.31 × 8 =
  13. 13.38 × 8 =
  14. 14.37 × 8 =
  15. 15.30 × 4 =
  16. 16.37 × 4 =
  17. 17.43 × 4 =
  18. 18.32 × 4 =
  19. 19.65 × 4 =
  20. 20.23 × 4 =
  21. 21.62 × 4 =
  22. 22.29 × 8 =
  23. 23.21 × 8 =
  24. 24.13 × 8 =
  25. 25.57 × 4 =
  26. 26.73 × 4 =
  27. 27.17 × 8 =
  28. 28.67 × 4 =
  29. 29.17 × 4 =
  30. 30.21 × 4 =
  31. 31.27 × 4 =
  32. 32.19 × 8 =
  33. 33.22 × 8 =
  34. 34.69 × 4 =
  35. 35.34 × 4 =
  36. 36.44 × 4 =
  37. 37.53 × 4 =
  38. 38.38 × 4 =
  39. 39.74 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 252
  2. 184
  3. 184
  4. 240
  5. 288
  6. 272
  7. 60
  8. 96
  9. 240
  10. 64
  11. 200
  12. 248
  13. 304
  14. 296
  15. 120
  16. 148
  17. 172
  18. 128
  19. 260
  20. 92
  21. 248
  22. 232
  23. 168
  24. 104
  25. 228
  26. 292
  27. 136
  28. 268
  29. 68
  30. 84
  31. 108
  32. 152
  33. 176
  34. 276
  35. 136
  36. 176
  37. 212
  38. 152
  39. 296
  40. 288

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