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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 927 · 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. 1.33 × 8 =
  2. 2.27 × 8 =
  3. 3.18 × 4 =
  4. 4.45 × 4 =
  5. 5.30 × 8 =
  6. 6.37 × 8 =
  7. 7.34 × 8 =
  8. 8.74 × 4 =
  9. 9.12 × 8 =
  10. 10.71 × 4 =
  11. 11.29 × 8 =
  12. 12.50 × 4 =
  13. 13.53 × 4 =
  14. 14.37 × 4 =
  15. 15.36 × 4 =
  16. 16.21 × 4 =
  17. 17.15 × 4 =
  18. 18.32 × 8 =
  19. 19.13 × 8 =
  20. 20.36 × 8 =
  21. 21.35 × 8 =
  22. 22.68 × 4 =
  23. 23.17 × 8 =
  24. 24.14 × 4 =
  25. 25.20 × 8 =
  26. 26.24 × 8 =
  27. 27.40 × 8 =
  28. 28.38 × 8 =
  29. 29.21 × 8 =
  30. 30.25 × 8 =
  31. 31.31 × 8 =
  32. 32.52 × 4 =
  33. 33.49 × 4 =
  34. 34.57 × 4 =
  35. 35.43 × 4 =
  36. 36.16 × 8 =
  37. 37.16 × 4 =
  38. 38.12 × 4 =
  39. 39.14 × 8 =
  40. 40.15 × 8 =

Answer key

  1. 264
  2. 216
  3. 72
  4. 180
  5. 240
  6. 296
  7. 272
  8. 296
  9. 96
  10. 284
  11. 232
  12. 200
  13. 212
  14. 148
  15. 144
  16. 84
  17. 60
  18. 256
  19. 104
  20. 288
  21. 280
  22. 272
  23. 136
  24. 56
  25. 160
  26. 192
  27. 320
  28. 304
  29. 168
  30. 200
  31. 248
  32. 208
  33. 196
  34. 228
  35. 172
  36. 128
  37. 64
  38. 48
  39. 112
  40. 120

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