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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 695 · 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. 1.46 × 4 =
  2. 2.40 × 4 =
  3. 3.69 × 4 =
  4. 4.16 × 8 =
  5. 5.37 × 4 =
  6. 6.33 × 4 =
  7. 7.22 × 4 =
  8. 8.31 × 8 =
  9. 9.28 × 8 =
  10. 10.12 × 4 =
  11. 11.73 × 4 =
  12. 12.17 × 4 =
  13. 13.40 × 8 =
  14. 14.42 × 4 =
  15. 15.24 × 8 =
  16. 16.72 × 4 =
  17. 17.20 × 8 =
  18. 18.25 × 8 =
  19. 19.39 × 8 =
  20. 20.48 × 4 =
  21. 21.55 × 4 =
  22. 22.18 × 4 =
  23. 23.34 × 4 =
  24. 24.43 × 4 =
  25. 25.29 × 4 =
  26. 26.13 × 8 =
  27. 27.26 × 8 =
  28. 28.62 × 4 =
  29. 29.37 × 8 =
  30. 30.24 × 4 =
  31. 31.71 × 4 =
  32. 32.18 × 8 =
  33. 33.34 × 8 =
  34. 34.67 × 4 =
  35. 35.32 × 8 =
  36. 36.29 × 8 =
  37. 37.28 × 4 =
  38. 38.60 × 4 =
  39. 39.38 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 184
  2. 160
  3. 276
  4. 128
  5. 148
  6. 132
  7. 88
  8. 248
  9. 224
  10. 48
  11. 292
  12. 68
  13. 320
  14. 168
  15. 192
  16. 288
  17. 160
  18. 200
  19. 312
  20. 192
  21. 220
  22. 72
  23. 136
  24. 172
  25. 116
  26. 104
  27. 208
  28. 248
  29. 296
  30. 96
  31. 284
  32. 144
  33. 272
  34. 268
  35. 256
  36. 232
  37. 112
  38. 240
  39. 152
  40. 84

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