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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 852 · 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. 1.44 × 4 =
  2. 2.40 × 8 =
  3. 3.19 × 8 =
  4. 4.23 × 8 =
  5. 5.53 × 4 =
  6. 6.37 × 4 =
  7. 7.20 × 8 =
  8. 8.18 × 8 =
  9. 9.61 × 4 =
  10. 10.47 × 4 =
  11. 11.32 × 4 =
  12. 12.54 × 4 =
  13. 13.24 × 4 =
  14. 14.38 × 8 =
  15. 15.29 × 8 =
  16. 16.64 × 4 =
  17. 17.35 × 4 =
  18. 18.13 × 4 =
  19. 19.34 × 8 =
  20. 20.36 × 8 =
  21. 21.37 × 8 =
  22. 22.26 × 4 =
  23. 23.29 × 4 =
  24. 24.17 × 4 =
  25. 25.43 × 4 =
  26. 26.65 × 4 =
  27. 27.32 × 8 =
  28. 28.71 × 4 =
  29. 29.17 × 8 =
  30. 30.56 × 4 =
  31. 31.24 × 8 =
  32. 32.66 × 4 =
  33. 33.30 × 4 =
  34. 34.18 × 4 =
  35. 35.16 × 8 =
  36. 36.69 × 4 =
  37. 37.60 × 4 =
  38. 38.30 × 8 =
  39. 39.39 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 176
  2. 320
  3. 152
  4. 184
  5. 212
  6. 148
  7. 160
  8. 144
  9. 244
  10. 188
  11. 128
  12. 216
  13. 96
  14. 304
  15. 232
  16. 256
  17. 140
  18. 52
  19. 272
  20. 288
  21. 296
  22. 104
  23. 116
  24. 68
  25. 172
  26. 260
  27. 256
  28. 284
  29. 136
  30. 224
  31. 192
  32. 264
  33. 120
  34. 72
  35. 128
  36. 276
  37. 240
  38. 240
  39. 156
  40. 104

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