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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 105 · 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. 1.26 × 4 =
  2. 2.12 × 8 =
  3. 3.51 × 4 =
  4. 4.38 × 4 =
  5. 5.50 × 4 =
  6. 6.24 × 8 =
  7. 7.74 × 4 =
  8. 8.14 × 8 =
  9. 9.16 × 8 =
  10. 10.64 × 4 =
  11. 11.17 × 8 =
  12. 12.35 × 4 =
  13. 13.67 × 4 =
  14. 14.13 × 8 =
  15. 15.26 × 8 =
  16. 16.22 × 4 =
  17. 17.63 × 4 =
  18. 18.27 × 8 =
  19. 19.33 × 4 =
  20. 20.12 × 4 =
  21. 21.19 × 8 =
  22. 22.38 × 8 =
  23. 23.25 × 4 =
  24. 24.32 × 8 =
  25. 25.13 × 4 =
  26. 26.18 × 4 =
  27. 27.56 × 4 =
  28. 28.69 × 4 =
  29. 29.68 × 4 =
  30. 30.22 × 8 =
  31. 31.62 × 4 =
  32. 32.29 × 4 =
  33. 33.15 × 8 =
  34. 34.18 × 8 =
  35. 35.34 × 8 =
  36. 36.23 × 4 =
  37. 37.40 × 4 =
  38. 38.75 × 4 =
  39. 39.40 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 104
  2. 96
  3. 204
  4. 152
  5. 200
  6. 192
  7. 296
  8. 112
  9. 128
  10. 256
  11. 136
  12. 140
  13. 268
  14. 104
  15. 208
  16. 88
  17. 252
  18. 216
  19. 132
  20. 48
  21. 152
  22. 304
  23. 100
  24. 256
  25. 52
  26. 72
  27. 224
  28. 276
  29. 272
  30. 176
  31. 248
  32. 116
  33. 120
  34. 144
  35. 272
  36. 92
  37. 160
  38. 300
  39. 320
  40. 220

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