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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 475 · 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. 1.20 × 4 =
  2. 2.53 × 4 =
  3. 3.14 × 4 =
  4. 4.57 × 4 =
  5. 5.32 × 4 =
  6. 6.17 × 8 =
  7. 7.27 × 4 =
  8. 8.37 × 8 =
  9. 9.29 × 8 =
  10. 10.26 × 8 =
  11. 11.38 × 8 =
  12. 12.36 × 4 =
  13. 13.31 × 8 =
  14. 14.49 × 4 =
  15. 15.34 × 4 =
  16. 16.51 × 4 =
  17. 17.72 × 4 =
  18. 18.54 × 4 =
  19. 19.21 × 4 =
  20. 20.30 × 4 =
  21. 21.19 × 8 =
  22. 22.60 × 4 =
  23. 23.37 × 4 =
  24. 24.45 × 4 =
  25. 25.47 × 4 =
  26. 26.67 × 4 =
  27. 27.25 × 8 =
  28. 28.36 × 8 =
  29. 29.31 × 4 =
  30. 30.68 × 4 =
  31. 31.40 × 8 =
  32. 32.16 × 8 =
  33. 33.27 × 8 =
  34. 34.34 × 8 =
  35. 35.55 × 4 =
  36. 36.38 × 4 =
  37. 37.70 × 4 =
  38. 38.35 × 8 =
  39. 39.65 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 80
  2. 212
  3. 56
  4. 228
  5. 128
  6. 136
  7. 108
  8. 296
  9. 232
  10. 208
  11. 304
  12. 144
  13. 248
  14. 196
  15. 136
  16. 204
  17. 288
  18. 216
  19. 84
  20. 120
  21. 152
  22. 240
  23. 148
  24. 180
  25. 188
  26. 268
  27. 200
  28. 288
  29. 124
  30. 272
  31. 320
  32. 128
  33. 216
  34. 272
  35. 220
  36. 152
  37. 280
  38. 280
  39. 260
  40. 120

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