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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 833 · 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. 1.27 × 4 =
  2. 2.67 × 4 =
  3. 3.31 × 8 =
  4. 4.36 × 8 =
  5. 5.12 × 4 =
  6. 6.37 × 8 =
  7. 7.20 × 8 =
  8. 8.24 × 8 =
  9. 9.38 × 8 =
  10. 10.22 × 8 =
  11. 11.30 × 8 =
  12. 12.33 × 8 =
  13. 13.36 × 4 =
  14. 14.13 × 8 =
  15. 15.34 × 8 =
  16. 16.29 × 8 =
  17. 17.28 × 8 =
  18. 18.30 × 4 =
  19. 19.71 × 4 =
  20. 20.39 × 8 =
  21. 21.16 × 4 =
  22. 22.46 × 4 =
  23. 23.16 × 8 =
  24. 24.60 × 4 =
  25. 25.55 × 4 =
  26. 26.68 × 4 =
  27. 27.69 × 4 =
  28. 28.27 × 8 =
  29. 29.39 × 4 =
  30. 30.47 × 4 =
  31. 31.37 × 4 =
  32. 32.20 × 4 =
  33. 33.12 × 8 =
  34. 34.17 × 8 =
  35. 35.57 × 4 =
  36. 36.56 × 4 =
  37. 37.48 × 4 =
  38. 38.22 × 4 =
  39. 39.23 × 8 =
  40. 40.40 × 4 =

Answer key

  1. 108
  2. 268
  3. 248
  4. 288
  5. 48
  6. 296
  7. 160
  8. 192
  9. 304
  10. 176
  11. 240
  12. 264
  13. 144
  14. 104
  15. 272
  16. 232
  17. 224
  18. 120
  19. 284
  20. 312
  21. 64
  22. 184
  23. 128
  24. 240
  25. 220
  26. 272
  27. 276
  28. 216
  29. 156
  30. 188
  31. 148
  32. 80
  33. 96
  34. 136
  35. 228
  36. 224
  37. 192
  38. 88
  39. 184
  40. 160

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