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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 215 · 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. 1.13 × 8 =
  2. 2.35 × 4 =
  3. 3.20 × 8 =
  4. 4.37 × 8 =
  5. 5.18 × 8 =
  6. 6.42 × 4 =
  7. 7.15 × 4 =
  8. 8.65 × 4 =
  9. 9.73 × 4 =
  10. 10.38 × 8 =
  11. 11.38 × 4 =
  12. 12.63 × 4 =
  13. 13.67 × 4 =
  14. 14.54 × 4 =
  15. 15.14 × 8 =
  16. 16.22 × 4 =
  17. 17.12 × 8 =
  18. 18.70 × 4 =
  19. 19.55 × 4 =
  20. 20.47 × 4 =
  21. 21.27 × 8 =
  22. 22.21 × 8 =
  23. 23.15 × 8 =
  24. 24.41 × 4 =
  25. 25.25 × 8 =
  26. 26.39 × 8 =
  27. 27.68 × 4 =
  28. 28.35 × 8 =
  29. 29.30 × 8 =
  30. 30.31 × 8 =
  31. 31.23 × 8 =
  32. 32.74 × 4 =
  33. 33.33 × 4 =
  34. 34.44 × 4 =
  35. 35.75 × 4 =
  36. 36.37 × 4 =
  37. 37.22 × 8 =
  38. 38.12 × 4 =
  39. 39.32 × 8 =
  40. 40.72 × 4 =

Answer key

  1. 104
  2. 140
  3. 160
  4. 296
  5. 144
  6. 168
  7. 60
  8. 260
  9. 292
  10. 304
  11. 152
  12. 252
  13. 268
  14. 216
  15. 112
  16. 88
  17. 96
  18. 280
  19. 220
  20. 188
  21. 216
  22. 168
  23. 120
  24. 164
  25. 200
  26. 312
  27. 272
  28. 280
  29. 240
  30. 248
  31. 184
  32. 296
  33. 132
  34. 176
  35. 300
  36. 148
  37. 176
  38. 48
  39. 256
  40. 288

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