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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 524 · 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. 1.22 × 4 =
  2. 2.63 × 4 =
  3. 3.15 × 4 =
  4. 4.47 × 4 =
  5. 5.33 × 8 =
  6. 6.32 × 8 =
  7. 7.62 × 4 =
  8. 8.49 × 4 =
  9. 9.71 × 4 =
  10. 10.38 × 8 =
  11. 11.19 × 8 =
  12. 12.28 × 8 =
  13. 13.17 × 8 =
  14. 14.55 × 4 =
  15. 15.36 × 4 =
  16. 16.68 × 4 =
  17. 17.53 × 4 =
  18. 18.54 × 4 =
  19. 19.34 × 8 =
  20. 20.34 × 4 =
  21. 21.24 × 4 =
  22. 22.36 × 8 =
  23. 23.22 × 8 =
  24. 24.21 × 8 =
  25. 25.19 × 4 =
  26. 26.12 × 4 =
  27. 27.29 × 8 =
  28. 28.27 × 4 =
  29. 29.30 × 4 =
  30. 30.60 × 4 =
  31. 31.29 × 4 =
  32. 32.33 × 4 =
  33. 33.67 × 4 =
  34. 34.37 × 8 =
  35. 35.43 × 4 =
  36. 36.20 × 8 =
  37. 37.12 × 8 =
  38. 38.26 × 8 =
  39. 39.18 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 88
  2. 252
  3. 60
  4. 188
  5. 264
  6. 256
  7. 248
  8. 196
  9. 284
  10. 304
  11. 152
  12. 224
  13. 136
  14. 220
  15. 144
  16. 272
  17. 212
  18. 216
  19. 272
  20. 136
  21. 96
  22. 288
  23. 176
  24. 168
  25. 76
  26. 48
  27. 232
  28. 108
  29. 120
  30. 240
  31. 116
  32. 132
  33. 268
  34. 296
  35. 172
  36. 160
  37. 96
  38. 208
  39. 72
  40. 128

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