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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 887 · 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. 2.69 × 4 =
  3. 3.68 × 4 =
  4. 4.33 × 4 =
  5. 5.13 × 8 =
  6. 6.31 × 4 =
  7. 7.39 × 8 =
  8. 8.14 × 8 =
  9. 9.71 × 4 =
  10. 10.54 × 4 =
  11. 11.29 × 8 =
  12. 12.20 × 8 =
  13. 13.19 × 8 =
  14. 14.18 × 8 =
  15. 15.36 × 8 =
  16. 16.34 × 8 =
  17. 17.27 × 8 =
  18. 18.46 × 4 =
  19. 19.37 × 4 =
  20. 20.19 × 4 =
  21. 21.14 × 4 =
  22. 22.17 × 8 =
  23. 23.16 × 8 =
  24. 24.32 × 4 =
  25. 25.48 × 4 =
  26. 26.73 × 4 =
  27. 27.30 × 8 =
  28. 28.22 × 4 =
  29. 29.23 × 8 =
  30. 30.40 × 4 =
  31. 31.63 × 4 =
  32. 32.21 × 8 =
  33. 33.15 × 4 =
  34. 34.43 × 4 =
  35. 35.56 × 4 =
  36. 36.32 × 8 =
  37. 37.59 × 4 =
  38. 38.64 × 4 =
  39. 39.33 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 104
  2. 276
  3. 272
  4. 132
  5. 104
  6. 124
  7. 312
  8. 112
  9. 284
  10. 216
  11. 232
  12. 160
  13. 152
  14. 144
  15. 288
  16. 272
  17. 216
  18. 184
  19. 148
  20. 76
  21. 56
  22. 136
  23. 128
  24. 128
  25. 192
  26. 292
  27. 240
  28. 88
  29. 184
  30. 160
  31. 252
  32. 168
  33. 60
  34. 172
  35. 224
  36. 256
  37. 236
  38. 256
  39. 264
  40. 220

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