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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 137 · 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. 1.34 × 8 =
  2. 2.36 × 8 =
  3. 3.21 × 8 =
  4. 4.16 × 8 =
  5. 5.44 × 4 =
  6. 6.71 × 4 =
  7. 7.43 × 4 =
  8. 8.24 × 8 =
  9. 9.40 × 8 =
  10. 10.26 × 8 =
  11. 11.16 × 4 =
  12. 12.13 × 8 =
  13. 13.73 × 4 =
  14. 14.31 × 8 =
  15. 15.54 × 4 =
  16. 16.15 × 8 =
  17. 17.30 × 8 =
  18. 18.33 × 8 =
  19. 19.29 × 8 =
  20. 20.37 × 8 =
  21. 21.19 × 8 =
  22. 22.29 × 4 =
  23. 23.19 × 4 =
  24. 24.13 × 4 =
  25. 25.21 × 4 =
  26. 26.12 × 8 =
  27. 27.22 × 4 =
  28. 28.63 × 4 =
  29. 29.72 × 4 =
  30. 30.55 × 4 =
  31. 31.47 × 4 =
  32. 32.23 × 8 =
  33. 33.69 × 4 =
  34. 34.25 × 8 =
  35. 35.32 × 8 =
  36. 36.20 × 8 =
  37. 37.65 × 4 =
  38. 38.35 × 4 =
  39. 39.49 × 4 =
  40. 40.15 × 4 =

Answer key

  1. 272
  2. 288
  3. 168
  4. 128
  5. 176
  6. 284
  7. 172
  8. 192
  9. 320
  10. 208
  11. 64
  12. 104
  13. 292
  14. 248
  15. 216
  16. 120
  17. 240
  18. 264
  19. 232
  20. 296
  21. 152
  22. 116
  23. 76
  24. 52
  25. 84
  26. 96
  27. 88
  28. 252
  29. 288
  30. 220
  31. 188
  32. 184
  33. 276
  34. 200
  35. 256
  36. 160
  37. 260
  38. 140
  39. 196
  40. 60

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