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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 258 · 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. 1.17 × 8 =
  2. 2.29 × 4 =
  3. 3.18 × 8 =
  4. 4.60 × 4 =
  5. 5.21 × 4 =
  6. 6.15 × 8 =
  7. 7.69 × 4 =
  8. 8.55 × 4 =
  9. 9.41 × 4 =
  10. 10.15 × 4 =
  11. 11.23 × 4 =
  12. 12.19 × 8 =
  13. 13.30 × 8 =
  14. 14.25 × 4 =
  15. 15.43 × 4 =
  16. 16.33 × 4 =
  17. 17.36 × 8 =
  18. 18.24 × 8 =
  19. 19.34 × 4 =
  20. 20.14 × 4 =
  21. 21.12 × 4 =
  22. 22.50 × 4 =
  23. 23.29 × 8 =
  24. 24.37 × 8 =
  25. 25.35 × 8 =
  26. 26.49 × 4 =
  27. 27.54 × 4 =
  28. 28.16 × 8 =
  29. 29.38 × 8 =
  30. 30.34 × 8 =
  31. 31.12 × 8 =
  32. 32.28 × 8 =
  33. 33.64 × 4 =
  34. 34.20 × 8 =
  35. 35.72 × 4 =
  36. 36.75 × 4 =
  37. 37.25 × 8 =
  38. 38.47 × 4 =
  39. 39.30 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 136
  2. 116
  3. 144
  4. 240
  5. 84
  6. 120
  7. 276
  8. 220
  9. 164
  10. 60
  11. 92
  12. 152
  13. 240
  14. 100
  15. 172
  16. 132
  17. 288
  18. 192
  19. 136
  20. 56
  21. 48
  22. 200
  23. 232
  24. 296
  25. 280
  26. 196
  27. 216
  28. 128
  29. 304
  30. 272
  31. 96
  32. 224
  33. 256
  34. 160
  35. 288
  36. 300
  37. 200
  38. 188
  39. 120
  40. 184

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