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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 572 · 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. 1.34 × 4 =
  2. 2.48 × 4 =
  3. 3.40 × 8 =
  4. 4.33 × 8 =
  5. 5.37 × 8 =
  6. 6.12 × 4 =
  7. 7.27 × 8 =
  8. 8.22 × 8 =
  9. 9.54 × 4 =
  10. 10.36 × 8 =
  11. 11.35 × 8 =
  12. 12.28 × 4 =
  13. 13.57 × 4 =
  14. 14.17 × 8 =
  15. 15.24 × 8 =
  16. 16.50 × 4 =
  17. 17.14 × 4 =
  18. 18.24 × 4 =
  19. 19.26 × 4 =
  20. 20.23 × 8 =
  21. 21.16 × 4 =
  22. 22.12 × 8 =
  23. 23.31 × 8 =
  24. 24.14 × 8 =
  25. 25.71 × 4 =
  26. 26.73 × 4 =
  27. 27.20 × 4 =
  28. 28.30 × 4 =
  29. 29.26 × 8 =
  30. 30.40 × 4 =
  31. 31.64 × 4 =
  32. 32.32 × 8 =
  33. 33.18 × 8 =
  34. 34.56 × 4 =
  35. 35.49 × 4 =
  36. 36.39 × 8 =
  37. 37.13 × 4 =
  38. 38.19 × 8 =
  39. 39.63 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 136
  2. 192
  3. 320
  4. 264
  5. 296
  6. 48
  7. 216
  8. 176
  9. 216
  10. 288
  11. 280
  12. 112
  13. 228
  14. 136
  15. 192
  16. 200
  17. 56
  18. 96
  19. 104
  20. 184
  21. 64
  22. 96
  23. 248
  24. 112
  25. 284
  26. 292
  27. 80
  28. 120
  29. 208
  30. 160
  31. 256
  32. 256
  33. 144
  34. 224
  35. 196
  36. 312
  37. 52
  38. 152
  39. 252
  40. 180

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