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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 233 · 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. 1.48 × 4 =
  2. 2.45 × 4 =
  3. 3.24 × 4 =
  4. 4.30 × 4 =
  5. 5.30 × 8 =
  6. 6.39 × 4 =
  7. 7.38 × 4 =
  8. 8.68 × 4 =
  9. 9.27 × 4 =
  10. 10.52 × 4 =
  11. 11.16 × 8 =
  12. 12.65 × 4 =
  13. 13.13 × 4 =
  14. 14.73 × 4 =
  15. 15.53 × 4 =
  16. 16.23 × 8 =
  17. 17.46 × 4 =
  18. 18.34 × 8 =
  19. 19.40 × 4 =
  20. 20.40 × 8 =
  21. 21.13 × 8 =
  22. 22.14 × 8 =
  23. 23.31 × 8 =
  24. 24.44 × 4 =
  25. 25.64 × 4 =
  26. 26.14 × 4 =
  27. 27.20 × 8 =
  28. 28.18 × 8 =
  29. 29.61 × 4 =
  30. 30.38 × 8 =
  31. 31.62 × 4 =
  32. 32.36 × 4 =
  33. 33.17 × 8 =
  34. 34.19 × 8 =
  35. 35.19 × 4 =
  36. 36.59 × 4 =
  37. 37.67 × 4 =
  38. 38.12 × 4 =
  39. 39.37 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 192
  2. 180
  3. 96
  4. 120
  5. 240
  6. 156
  7. 152
  8. 272
  9. 108
  10. 208
  11. 128
  12. 260
  13. 52
  14. 292
  15. 212
  16. 184
  17. 184
  18. 272
  19. 160
  20. 320
  21. 104
  22. 112
  23. 248
  24. 176
  25. 256
  26. 56
  27. 160
  28. 144
  29. 244
  30. 304
  31. 248
  32. 144
  33. 136
  34. 152
  35. 76
  36. 236
  37. 268
  38. 48
  39. 148
  40. 88

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