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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 721 · 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. 1.29 × 4 =
  2. 2.24 × 8 =
  3. 3.39 × 8 =
  4. 4.55 × 4 =
  5. 5.26 × 8 =
  6. 6.17 × 8 =
  7. 7.73 × 4 =
  8. 8.40 × 8 =
  9. 9.67 × 4 =
  10. 10.16 × 4 =
  11. 11.29 × 8 =
  12. 12.68 × 4 =
  13. 13.53 × 4 =
  14. 14.30 × 8 =
  15. 15.62 × 4 =
  16. 16.59 × 4 =
  17. 17.34 × 4 =
  18. 18.23 × 8 =
  19. 19.25 × 8 =
  20. 20.13 × 8 =
  21. 21.36 × 8 =
  22. 22.20 × 8 =
  23. 23.18 × 8 =
  24. 24.74 × 4 =
  25. 25.27 × 8 =
  26. 26.28 × 8 =
  27. 27.48 × 4 =
  28. 28.16 × 8 =
  29. 29.32 × 4 =
  30. 30.19 × 8 =
  31. 31.21 × 8 =
  32. 32.38 × 8 =
  33. 33.75 × 4 =
  34. 34.18 × 4 =
  35. 35.33 × 4 =
  36. 36.12 × 8 =
  37. 37.21 × 4 =
  38. 38.50 × 4 =
  39. 39.65 × 4 =
  40. 40.36 × 4 =

Answer key

  1. 116
  2. 192
  3. 312
  4. 220
  5. 208
  6. 136
  7. 292
  8. 320
  9. 268
  10. 64
  11. 232
  12. 272
  13. 212
  14. 240
  15. 248
  16. 236
  17. 136
  18. 184
  19. 200
  20. 104
  21. 288
  22. 160
  23. 144
  24. 296
  25. 216
  26. 224
  27. 192
  28. 128
  29. 128
  30. 152
  31. 168
  32. 304
  33. 300
  34. 72
  35. 132
  36. 96
  37. 84
  38. 200
  39. 260
  40. 144

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