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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 917 · 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. 1.46 × 4 =
  2. 2.17 × 8 =
  3. 3.26 × 8 =
  4. 4.15 × 4 =
  5. 5.12 × 4 =
  6. 6.33 × 8 =
  7. 7.30 × 8 =
  8. 8.35 × 4 =
  9. 9.22 × 8 =
  10. 10.35 × 8 =
  11. 11.13 × 8 =
  12. 12.37 × 4 =
  13. 13.48 × 4 =
  14. 14.29 × 8 =
  15. 15.32 × 8 =
  16. 16.19 × 8 =
  17. 17.13 × 4 =
  18. 18.31 × 8 =
  19. 19.38 × 4 =
  20. 20.36 × 8 =
  21. 21.50 × 4 =
  22. 22.60 × 4 =
  23. 23.65 × 4 =
  24. 24.33 × 4 =
  25. 25.23 × 8 =
  26. 26.21 × 8 =
  27. 27.64 × 4 =
  28. 28.56 × 4 =
  29. 29.63 × 4 =
  30. 30.28 × 8 =
  31. 31.24 × 8 =
  32. 32.47 × 4 =
  33. 33.44 × 4 =
  34. 34.40 × 4 =
  35. 35.31 × 4 =
  36. 36.59 × 4 =
  37. 37.25 × 8 =
  38. 38.38 × 8 =
  39. 39.16 × 4 =
  40. 40.40 × 8 =

Answer key

  1. 184
  2. 136
  3. 208
  4. 60
  5. 48
  6. 264
  7. 240
  8. 140
  9. 176
  10. 280
  11. 104
  12. 148
  13. 192
  14. 232
  15. 256
  16. 152
  17. 52
  18. 248
  19. 152
  20. 288
  21. 200
  22. 240
  23. 260
  24. 132
  25. 184
  26. 168
  27. 256
  28. 224
  29. 252
  30. 224
  31. 192
  32. 188
  33. 176
  34. 160
  35. 124
  36. 236
  37. 200
  38. 304
  39. 64
  40. 320

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