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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 641 · 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. 1.54 × 4 =
  2. 2.52 × 4 =
  3. 3.60 × 4 =
  4. 4.58 × 4 =
  5. 5.40 × 4 =
  6. 6.38 × 8 =
  7. 7.34 × 4 =
  8. 8.43 × 4 =
  9. 9.19 × 4 =
  10. 10.22 × 4 =
  11. 11.72 × 4 =
  12. 12.21 × 4 =
  13. 13.73 × 4 =
  14. 14.74 × 4 =
  15. 15.53 × 4 =
  16. 16.19 × 8 =
  17. 17.14 × 8 =
  18. 18.24 × 8 =
  19. 19.15 × 8 =
  20. 20.50 × 4 =
  21. 21.71 × 4 =
  22. 22.64 × 4 =
  23. 23.59 × 4 =
  24. 24.68 × 4 =
  25. 25.29 × 4 =
  26. 26.57 × 4 =
  27. 27.31 × 8 =
  28. 28.25 × 8 =
  29. 29.32 × 8 =
  30. 30.75 × 4 =
  31. 31.66 × 4 =
  32. 32.25 × 4 =
  33. 33.67 × 4 =
  34. 34.39 × 8 =
  35. 35.17 × 8 =
  36. 36.21 × 8 =
  37. 37.30 × 4 =
  38. 38.61 × 4 =
  39. 39.29 × 8 =
  40. 40.32 × 4 =

Answer key

  1. 216
  2. 208
  3. 240
  4. 232
  5. 160
  6. 304
  7. 136
  8. 172
  9. 76
  10. 88
  11. 288
  12. 84
  13. 292
  14. 296
  15. 212
  16. 152
  17. 112
  18. 192
  19. 120
  20. 200
  21. 284
  22. 256
  23. 236
  24. 272
  25. 116
  26. 228
  27. 248
  28. 200
  29. 256
  30. 300
  31. 264
  32. 100
  33. 268
  34. 312
  35. 136
  36. 168
  37. 120
  38. 244
  39. 232
  40. 128

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