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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 318 · 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. 1.20 × 4 =
  2. 2.59 × 4 =
  3. 3.36 × 4 =
  4. 4.26 × 8 =
  5. 5.35 × 8 =
  6. 6.19 × 8 =
  7. 7.34 × 8 =
  8. 8.13 × 4 =
  9. 9.38 × 8 =
  10. 10.42 × 4 =
  11. 11.15 × 8 =
  12. 12.23 × 4 =
  13. 13.55 × 4 =
  14. 14.16 × 8 =
  15. 15.16 × 4 =
  16. 16.64 × 4 =
  17. 17.33 × 8 =
  18. 18.32 × 4 =
  19. 19.63 × 4 =
  20. 20.43 × 4 =
  21. 21.33 × 4 =
  22. 22.32 × 8 =
  23. 23.48 × 4 =
  24. 24.29 × 8 =
  25. 25.41 × 4 =
  26. 26.57 × 4 =
  27. 27.27 × 8 =
  28. 28.18 × 4 =
  29. 29.13 × 8 =
  30. 30.40 × 8 =
  31. 31.29 × 4 =
  32. 32.31 × 4 =
  33. 33.38 × 4 =
  34. 34.74 × 4 =
  35. 35.28 × 8 =
  36. 36.20 × 8 =
  37. 37.12 × 8 =
  38. 38.21 × 8 =
  39. 39.25 × 8 =
  40. 40.67 × 4 =

Answer key

  1. 80
  2. 236
  3. 144
  4. 208
  5. 280
  6. 152
  7. 272
  8. 52
  9. 304
  10. 168
  11. 120
  12. 92
  13. 220
  14. 128
  15. 64
  16. 256
  17. 264
  18. 128
  19. 252
  20. 172
  21. 132
  22. 256
  23. 192
  24. 232
  25. 164
  26. 228
  27. 216
  28. 72
  29. 104
  30. 320
  31. 116
  32. 124
  33. 152
  34. 296
  35. 224
  36. 160
  37. 96
  38. 168
  39. 200
  40. 268

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