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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 907 · 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. 1.53 × 4 =
  2. 2.33 × 8 =
  3. 3.69 × 4 =
  4. 4.23 × 8 =
  5. 5.73 × 4 =
  6. 6.27 × 8 =
  7. 7.44 × 4 =
  8. 8.16 × 8 =
  9. 9.32 × 4 =
  10. 10.29 × 8 =
  11. 11.56 × 4 =
  12. 12.54 × 4 =
  13. 13.20 × 8 =
  14. 14.12 × 4 =
  15. 15.50 × 4 =
  16. 16.26 × 8 =
  17. 17.22 × 8 =
  18. 18.49 × 4 =
  19. 19.14 × 8 =
  20. 20.19 × 8 =
  21. 21.57 × 4 =
  22. 22.24 × 8 =
  23. 23.15 × 4 =
  24. 24.60 × 4 =
  25. 25.13 × 8 =
  26. 26.16 × 4 =
  27. 27.39 × 8 =
  28. 28.28 × 4 =
  29. 29.41 × 4 =
  30. 30.24 × 4 =
  31. 31.71 × 4 =
  32. 32.30 × 4 =
  33. 33.68 × 4 =
  34. 34.45 × 4 =
  35. 35.31 × 8 =
  36. 36.48 × 4 =
  37. 37.32 × 8 =
  38. 38.59 × 4 =
  39. 39.37 × 4 =
  40. 40.18 × 4 =

Answer key

  1. 212
  2. 264
  3. 276
  4. 184
  5. 292
  6. 216
  7. 176
  8. 128
  9. 128
  10. 232
  11. 224
  12. 216
  13. 160
  14. 48
  15. 200
  16. 208
  17. 176
  18. 196
  19. 112
  20. 152
  21. 228
  22. 192
  23. 60
  24. 240
  25. 104
  26. 64
  27. 312
  28. 112
  29. 164
  30. 96
  31. 284
  32. 120
  33. 272
  34. 180
  35. 248
  36. 192
  37. 256
  38. 236
  39. 148
  40. 72

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