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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 588 · 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. 1.52 × 4 =
  2. 2.18 × 4 =
  3. 3.40 × 8 =
  4. 4.26 × 4 =
  5. 5.20 × 8 =
  6. 6.28 × 8 =
  7. 7.22 × 8 =
  8. 8.38 × 4 =
  9. 9.34 × 8 =
  10. 10.72 × 4 =
  11. 11.50 × 4 =
  12. 12.12 × 8 =
  13. 13.63 × 4 =
  14. 14.55 × 4 =
  15. 15.16 × 8 =
  16. 16.67 × 4 =
  17. 17.62 × 4 =
  18. 18.73 × 4 =
  19. 19.44 × 4 =
  20. 20.17 × 4 =
  21. 21.35 × 8 =
  22. 22.16 × 4 =
  23. 23.21 × 4 =
  24. 24.49 × 4 =
  25. 25.29 × 8 =
  26. 26.13 × 8 =
  27. 27.32 × 8 =
  28. 28.27 × 8 =
  29. 29.33 × 8 =
  30. 30.22 × 4 =
  31. 31.45 × 4 =
  32. 32.38 × 8 =
  33. 33.56 × 4 =
  34. 34.65 × 4 =
  35. 35.31 × 8 =
  36. 36.19 × 8 =
  37. 37.39 × 8 =
  38. 38.12 × 4 =
  39. 39.17 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 208
  2. 72
  3. 320
  4. 104
  5. 160
  6. 224
  7. 176
  8. 152
  9. 272
  10. 288
  11. 200
  12. 96
  13. 252
  14. 220
  15. 128
  16. 268
  17. 248
  18. 292
  19. 176
  20. 68
  21. 280
  22. 64
  23. 84
  24. 196
  25. 232
  26. 104
  27. 256
  28. 216
  29. 264
  30. 88
  31. 180
  32. 304
  33. 224
  34. 260
  35. 248
  36. 152
  37. 312
  38. 48
  39. 136
  40. 296

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