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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 612 · 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. 1.69 × 4 =
  2. 2.40 × 4 =
  3. 3.37 × 8 =
  4. 4.68 × 4 =
  5. 5.25 × 8 =
  6. 6.16 × 8 =
  7. 7.67 × 4 =
  8. 8.30 × 8 =
  9. 9.49 × 4 =
  10. 10.40 × 8 =
  11. 11.17 × 8 =
  12. 12.38 × 8 =
  13. 13.47 × 4 =
  14. 14.26 × 8 =
  15. 15.75 × 4 =
  16. 16.65 × 4 =
  17. 17.31 × 8 =
  18. 18.35 × 8 =
  19. 19.14 × 8 =
  20. 20.32 × 4 =
  21. 21.18 × 4 =
  22. 22.20 × 8 =
  23. 23.12 × 8 =
  24. 24.71 × 4 =
  25. 25.29 × 8 =
  26. 26.72 × 4 =
  27. 27.39 × 8 =
  28. 28.18 × 8 =
  29. 29.12 × 4 =
  30. 30.30 × 4 =
  31. 31.64 × 4 =
  32. 32.55 × 4 =
  33. 33.13 × 4 =
  34. 34.21 × 4 =
  35. 35.33 × 8 =
  36. 36.26 × 4 =
  37. 37.48 × 4 =
  38. 38.57 × 4 =
  39. 39.15 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 276
  2. 160
  3. 296
  4. 272
  5. 200
  6. 128
  7. 268
  8. 240
  9. 196
  10. 320
  11. 136
  12. 304
  13. 188
  14. 208
  15. 300
  16. 260
  17. 248
  18. 280
  19. 112
  20. 128
  21. 72
  22. 160
  23. 96
  24. 284
  25. 232
  26. 288
  27. 312
  28. 144
  29. 48
  30. 120
  31. 256
  32. 220
  33. 52
  34. 84
  35. 264
  36. 104
  37. 192
  38. 228
  39. 120
  40. 88

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