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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 192 · 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. 1.72 × 4 =
  2. 2.34 × 8 =
  3. 3.49 × 4 =
  4. 4.19 × 4 =
  5. 5.35 × 8 =
  6. 6.18 × 8 =
  7. 7.30 × 4 =
  8. 8.70 × 4 =
  9. 9.56 × 4 =
  10. 10.31 × 8 =
  11. 11.42 × 4 =
  12. 12.68 × 4 =
  13. 13.52 × 4 =
  14. 14.55 × 4 =
  15. 15.26 × 8 =
  16. 16.28 × 8 =
  17. 17.71 × 4 =
  18. 18.33 × 4 =
  19. 19.16 × 4 =
  20. 20.39 × 8 =
  21. 21.44 × 4 =
  22. 22.53 × 4 =
  23. 23.54 × 4 =
  24. 24.23 × 8 =
  25. 25.22 × 4 =
  26. 26.38 × 4 =
  27. 27.65 × 4 =
  28. 28.58 × 4 =
  29. 29.23 × 4 =
  30. 30.36 × 8 =
  31. 31.39 × 4 =
  32. 32.17 × 8 =
  33. 33.20 × 4 =
  34. 34.14 × 8 =
  35. 35.29 × 4 =
  36. 36.37 × 8 =
  37. 37.63 × 4 =
  38. 38.32 × 8 =
  39. 39.73 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 288
  2. 272
  3. 196
  4. 76
  5. 280
  6. 144
  7. 120
  8. 280
  9. 224
  10. 248
  11. 168
  12. 272
  13. 208
  14. 220
  15. 208
  16. 224
  17. 284
  18. 132
  19. 64
  20. 312
  21. 176
  22. 212
  23. 216
  24. 184
  25. 88
  26. 152
  27. 260
  28. 232
  29. 92
  30. 288
  31. 156
  32. 136
  33. 80
  34. 112
  35. 116
  36. 296
  37. 252
  38. 256
  39. 292
  40. 264

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