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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 393 · 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. 1.28 × 8 =
  2. 2.53 × 4 =
  3. 3.72 × 4 =
  4. 4.13 × 8 =
  5. 5.27 × 8 =
  6. 6.73 × 4 =
  7. 7.56 × 4 =
  8. 8.25 × 8 =
  9. 9.40 × 8 =
  10. 10.13 × 4 =
  11. 11.67 × 4 =
  12. 12.48 × 4 =
  13. 13.46 × 4 =
  14. 14.31 × 8 =
  15. 15.37 × 4 =
  16. 16.70 × 4 =
  17. 17.36 × 8 =
  18. 18.24 × 8 =
  19. 19.30 × 8 =
  20. 20.75 × 4 =
  21. 21.17 × 4 =
  22. 22.19 × 4 =
  23. 23.14 × 8 =
  24. 24.71 × 4 =
  25. 25.21 × 4 =
  26. 26.49 × 4 =
  27. 27.65 × 4 =
  28. 28.32 × 8 =
  29. 29.47 × 4 =
  30. 30.45 × 4 =
  31. 31.50 × 4 =
  32. 32.57 × 4 =
  33. 33.40 × 4 =
  34. 34.74 × 4 =
  35. 35.38 × 8 =
  36. 36.35 × 8 =
  37. 37.54 × 4 =
  38. 38.42 × 4 =
  39. 39.22 × 8 =
  40. 40.33 × 4 =

Answer key

  1. 224
  2. 212
  3. 288
  4. 104
  5. 216
  6. 292
  7. 224
  8. 200
  9. 320
  10. 52
  11. 268
  12. 192
  13. 184
  14. 248
  15. 148
  16. 280
  17. 288
  18. 192
  19. 240
  20. 300
  21. 68
  22. 76
  23. 112
  24. 284
  25. 84
  26. 196
  27. 260
  28. 256
  29. 188
  30. 180
  31. 200
  32. 228
  33. 160
  34. 296
  35. 304
  36. 280
  37. 216
  38. 168
  39. 176
  40. 132

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