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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 59 · 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. 1.73 × 4 =
  2. 2.37 × 4 =
  3. 3.18 × 4 =
  4. 4.28 × 8 =
  5. 5.74 × 4 =
  6. 6.19 × 8 =
  7. 7.34 × 8 =
  8. 8.31 × 8 =
  9. 9.40 × 8 =
  10. 10.39 × 4 =
  11. 11.50 × 4 =
  12. 12.23 × 8 =
  13. 13.23 × 4 =
  14. 14.42 × 4 =
  15. 15.14 × 8 =
  16. 16.37 × 8 =
  17. 17.67 × 4 =
  18. 18.13 × 8 =
  19. 19.15 × 4 =
  20. 20.13 × 4 =
  21. 21.17 × 4 =
  22. 22.16 × 8 =
  23. 23.40 × 4 =
  24. 24.29 × 8 =
  25. 25.72 × 4 =
  26. 26.71 × 4 =
  27. 27.26 × 8 =
  28. 28.57 × 4 =
  29. 29.38 × 8 =
  30. 30.12 × 4 =
  31. 31.48 × 4 =
  32. 32.32 × 4 =
  33. 33.47 × 4 =
  34. 34.22 × 8 =
  35. 35.24 × 4 =
  36. 36.18 × 8 =
  37. 37.24 × 8 =
  38. 38.75 × 4 =
  39. 39.30 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 292
  2. 148
  3. 72
  4. 224
  5. 296
  6. 152
  7. 272
  8. 248
  9. 320
  10. 156
  11. 200
  12. 184
  13. 92
  14. 168
  15. 112
  16. 296
  17. 268
  18. 104
  19. 60
  20. 52
  21. 68
  22. 128
  23. 160
  24. 232
  25. 288
  26. 284
  27. 208
  28. 228
  29. 304
  30. 48
  31. 192
  32. 128
  33. 188
  34. 176
  35. 96
  36. 144
  37. 192
  38. 300
  39. 120
  40. 256

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