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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 453 · 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. 1.50 × 4 =
  2. 2.35 × 8 =
  3. 3.15 × 8 =
  4. 4.16 × 8 =
  5. 5.23 × 8 =
  6. 6.27 × 4 =
  7. 7.41 × 4 =
  8. 8.72 × 4 =
  9. 9.20 × 4 =
  10. 10.27 × 8 =
  11. 11.15 × 4 =
  12. 12.58 × 4 =
  13. 13.74 × 4 =
  14. 14.64 × 4 =
  15. 15.54 × 4 =
  16. 16.31 × 8 =
  17. 17.30 × 8 =
  18. 18.31 × 4 =
  19. 19.17 × 8 =
  20. 20.18 × 8 =
  21. 21.73 × 4 =
  22. 22.34 × 4 =
  23. 23.34 × 8 =
  24. 24.20 × 8 =
  25. 25.53 × 4 =
  26. 26.57 × 4 =
  27. 27.40 × 8 =
  28. 28.21 × 4 =
  29. 29.32 × 8 =
  30. 30.32 × 4 =
  31. 31.43 × 4 =
  32. 32.22 × 8 =
  33. 33.42 × 4 =
  34. 34.26 × 4 =
  35. 35.12 × 8 =
  36. 36.67 × 4 =
  37. 37.19 × 8 =
  38. 38.30 × 4 =
  39. 39.29 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 200
  2. 280
  3. 120
  4. 128
  5. 184
  6. 108
  7. 164
  8. 288
  9. 80
  10. 216
  11. 60
  12. 232
  13. 296
  14. 256
  15. 216
  16. 248
  17. 240
  18. 124
  19. 136
  20. 144
  21. 292
  22. 136
  23. 272
  24. 160
  25. 212
  26. 228
  27. 320
  28. 84
  29. 256
  30. 128
  31. 172
  32. 176
  33. 168
  34. 104
  35. 96
  36. 268
  37. 152
  38. 120
  39. 116
  40. 252

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