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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 577 · 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. 1.31 × 8 =
  2. 2.64 × 4 =
  3. 3.16 × 8 =
  4. 4.54 × 4 =
  5. 5.75 × 4 =
  6. 6.30 × 4 =
  7. 7.17 × 4 =
  8. 8.35 × 8 =
  9. 9.67 × 4 =
  10. 10.39 × 8 =
  11. 11.33 × 4 =
  12. 12.50 × 4 =
  13. 13.14 × 8 =
  14. 14.17 × 8 =
  15. 15.48 × 4 =
  16. 16.30 × 8 =
  17. 17.25 × 8 =
  18. 18.36 × 8 =
  19. 19.18 × 8 =
  20. 20.52 × 4 =
  21. 21.26 × 4 =
  22. 22.40 × 4 =
  23. 23.29 × 4 =
  24. 24.47 × 4 =
  25. 25.61 × 4 =
  26. 26.12 × 8 =
  27. 27.21 × 8 =
  28. 28.58 × 4 =
  29. 29.13 × 8 =
  30. 30.18 × 4 =
  31. 31.15 × 8 =
  32. 32.15 × 4 =
  33. 33.23 × 4 =
  34. 34.37 × 8 =
  35. 35.71 × 4 =
  36. 36.63 × 4 =
  37. 37.34 × 4 =
  38. 38.74 × 4 =
  39. 39.23 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 248
  2. 256
  3. 128
  4. 216
  5. 300
  6. 120
  7. 68
  8. 280
  9. 268
  10. 312
  11. 132
  12. 200
  13. 112
  14. 136
  15. 192
  16. 240
  17. 200
  18. 288
  19. 144
  20. 208
  21. 104
  22. 160
  23. 116
  24. 188
  25. 244
  26. 96
  27. 168
  28. 232
  29. 104
  30. 72
  31. 120
  32. 60
  33. 92
  34. 296
  35. 284
  36. 252
  37. 136
  38. 296
  39. 184
  40. 320

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