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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 297 · 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. 2.49 × 4 =
  3. 3.13 × 8 =
  4. 4.35 × 4 =
  5. 5.21 × 8 =
  6. 6.40 × 8 =
  7. 7.42 × 4 =
  8. 8.60 × 4 =
  9. 9.47 × 4 =
  10. 10.24 × 4 =
  11. 11.63 × 4 =
  12. 12.46 × 4 =
  13. 13.33 × 8 =
  14. 14.21 × 4 =
  15. 15.64 × 4 =
  16. 16.72 × 4 =
  17. 17.16 × 4 =
  18. 18.31 × 4 =
  19. 19.53 × 4 =
  20. 20.31 × 8 =
  21. 21.23 × 8 =
  22. 22.24 × 8 =
  23. 23.12 × 4 =
  24. 24.12 × 8 =
  25. 25.62 × 4 =
  26. 26.33 × 4 =
  27. 27.43 × 4 =
  28. 28.20 × 4 =
  29. 29.37 × 8 =
  30. 30.29 × 8 =
  31. 31.25 × 8 =
  32. 32.75 × 4 =
  33. 33.36 × 8 =
  34. 34.34 × 8 =
  35. 35.25 × 4 =
  36. 36.45 × 4 =
  37. 37.28 × 8 =
  38. 38.37 × 4 =
  39. 39.16 × 8 =
  40. 40.74 × 4 =

Answer key

  1. 136
  2. 196
  3. 104
  4. 140
  5. 168
  6. 320
  7. 168
  8. 240
  9. 188
  10. 96
  11. 252
  12. 184
  13. 264
  14. 84
  15. 256
  16. 288
  17. 64
  18. 124
  19. 212
  20. 248
  21. 184
  22. 192
  23. 48
  24. 96
  25. 248
  26. 132
  27. 172
  28. 80
  29. 296
  30. 232
  31. 200
  32. 300
  33. 288
  34. 272
  35. 100
  36. 180
  37. 224
  38. 148
  39. 128
  40. 296

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