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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 971 · 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. 1.44 × 4 =
  2. 2.21 × 8 =
  3. 3.75 × 4 =
  4. 4.14 × 8 =
  5. 5.19 × 8 =
  6. 6.57 × 4 =
  7. 7.16 × 8 =
  8. 8.33 × 8 =
  9. 9.17 × 8 =
  10. 10.74 × 4 =
  11. 11.38 × 4 =
  12. 12.39 × 8 =
  13. 13.71 × 4 =
  14. 14.66 × 4 =
  15. 15.73 × 4 =
  16. 16.32 × 8 =
  17. 17.34 × 8 =
  18. 18.18 × 8 =
  19. 19.43 × 4 =
  20. 20.68 × 4 =
  21. 21.25 × 4 =
  22. 22.65 × 4 =
  23. 23.46 × 4 =
  24. 24.24 × 4 =
  25. 25.30 × 4 =
  26. 26.29 × 8 =
  27. 27.63 × 4 =
  28. 28.47 × 4 =
  29. 29.58 × 4 =
  30. 30.12 × 4 =
  31. 31.27 × 8 =
  32. 32.23 × 8 =
  33. 33.37 × 8 =
  34. 34.31 × 8 =
  35. 35.41 × 4 =
  36. 36.32 × 4 =
  37. 37.22 × 4 =
  38. 38.64 × 4 =
  39. 39.28 × 8 =
  40. 40.21 × 4 =

Answer key

  1. 176
  2. 168
  3. 300
  4. 112
  5. 152
  6. 228
  7. 128
  8. 264
  9. 136
  10. 296
  11. 152
  12. 312
  13. 284
  14. 264
  15. 292
  16. 256
  17. 272
  18. 144
  19. 172
  20. 272
  21. 100
  22. 260
  23. 184
  24. 96
  25. 120
  26. 232
  27. 252
  28. 188
  29. 232
  30. 48
  31. 216
  32. 184
  33. 296
  34. 248
  35. 164
  36. 128
  37. 88
  38. 256
  39. 224
  40. 84

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