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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 586 · 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. 1.65 × 4 =
  2. 2.21 × 4 =
  3. 3.57 × 4 =
  4. 4.25 × 8 =
  5. 5.67 × 4 =
  6. 6.13 × 8 =
  7. 7.50 × 4 =
  8. 8.37 × 4 =
  9. 9.22 × 8 =
  10. 10.25 × 4 =
  11. 11.28 × 4 =
  12. 12.23 × 8 =
  13. 13.54 × 4 =
  14. 14.17 × 8 =
  15. 15.29 × 4 =
  16. 16.64 × 4 =
  17. 17.22 × 4 =
  18. 18.71 × 4 =
  19. 19.72 × 4 =
  20. 20.36 × 8 =
  21. 21.73 × 4 =
  22. 22.38 × 8 =
  23. 23.53 × 4 =
  24. 24.41 × 4 =
  25. 25.38 × 4 =
  26. 26.24 × 8 =
  27. 27.55 × 4 =
  28. 28.34 × 8 =
  29. 29.42 × 4 =
  30. 30.37 × 8 =
  31. 31.40 × 8 =
  32. 32.13 × 4 =
  33. 33.35 × 8 =
  34. 34.30 × 4 =
  35. 35.51 × 4 =
  36. 36.12 × 8 =
  37. 37.33 × 8 =
  38. 38.18 × 8 =
  39. 39.32 × 8 =
  40. 40.15 × 4 =

Answer key

  1. 260
  2. 84
  3. 228
  4. 200
  5. 268
  6. 104
  7. 200
  8. 148
  9. 176
  10. 100
  11. 112
  12. 184
  13. 216
  14. 136
  15. 116
  16. 256
  17. 88
  18. 284
  19. 288
  20. 288
  21. 292
  22. 304
  23. 212
  24. 164
  25. 152
  26. 192
  27. 220
  28. 272
  29. 168
  30. 296
  31. 320
  32. 52
  33. 280
  34. 120
  35. 204
  36. 96
  37. 264
  38. 144
  39. 256
  40. 60

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