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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 238 · 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. 1.19 × 8 =
  2. 2.37 × 8 =
  3. 3.28 × 8 =
  4. 4.12 × 8 =
  5. 5.36 × 8 =
  6. 6.34 × 8 =
  7. 7.26 × 4 =
  8. 8.73 × 4 =
  9. 9.63 × 4 =
  10. 10.32 × 4 =
  11. 11.55 × 4 =
  12. 12.45 × 4 =
  13. 13.31 × 4 =
  14. 14.29 × 8 =
  15. 15.25 × 4 =
  16. 16.61 × 4 =
  17. 17.67 × 4 =
  18. 18.20 × 8 =
  19. 19.38 × 8 =
  20. 20.27 × 4 =
  21. 21.21 × 8 =
  22. 22.19 × 4 =
  23. 23.49 × 4 =
  24. 24.58 × 4 =
  25. 25.57 × 4 =
  26. 26.40 × 8 =
  27. 27.43 × 4 =
  28. 28.62 × 4 =
  29. 29.33 × 4 =
  30. 30.34 × 4 =
  31. 31.51 × 4 =
  32. 32.15 × 8 =
  33. 33.31 × 8 =
  34. 34.16 × 4 =
  35. 35.14 × 8 =
  36. 36.47 × 4 =
  37. 37.48 × 4 =
  38. 38.13 × 4 =
  39. 39.32 × 8 =
  40. 40.30 × 4 =

Answer key

  1. 152
  2. 296
  3. 224
  4. 96
  5. 288
  6. 272
  7. 104
  8. 292
  9. 252
  10. 128
  11. 220
  12. 180
  13. 124
  14. 232
  15. 100
  16. 244
  17. 268
  18. 160
  19. 304
  20. 108
  21. 168
  22. 76
  23. 196
  24. 232
  25. 228
  26. 320
  27. 172
  28. 248
  29. 132
  30. 136
  31. 204
  32. 120
  33. 248
  34. 64
  35. 112
  36. 188
  37. 192
  38. 52
  39. 256
  40. 120

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