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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 960 · 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. 1.27 × 8 =
  2. 2.13 × 8 =
  3. 3.29 × 4 =
  4. 4.30 × 8 =
  5. 5.48 × 4 =
  6. 6.52 × 4 =
  7. 7.57 × 4 =
  8. 8.39 × 4 =
  9. 9.24 × 4 =
  10. 10.22 × 8 =
  11. 11.36 × 8 =
  12. 12.69 × 4 =
  13. 13.59 × 4 =
  14. 14.70 × 4 =
  15. 15.28 × 4 =
  16. 16.55 × 4 =
  17. 17.42 × 4 =
  18. 18.12 × 4 =
  19. 19.13 × 4 =
  20. 20.40 × 4 =
  21. 21.38 × 4 =
  22. 22.41 × 4 =
  23. 23.16 × 4 =
  24. 24.43 × 4 =
  25. 25.21 × 8 =
  26. 26.20 × 8 =
  27. 27.53 × 4 =
  28. 28.16 × 8 =
  29. 29.62 × 4 =
  30. 30.74 × 4 =
  31. 31.18 × 4 =
  32. 32.36 × 4 =
  33. 33.31 × 8 =
  34. 34.68 × 4 =
  35. 35.38 × 8 =
  36. 36.33 × 8 =
  37. 37.17 × 8 =
  38. 38.30 × 4 =
  39. 39.20 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 216
  2. 104
  3. 116
  4. 240
  5. 192
  6. 208
  7. 228
  8. 156
  9. 96
  10. 176
  11. 288
  12. 276
  13. 236
  14. 280
  15. 112
  16. 220
  17. 168
  18. 48
  19. 52
  20. 160
  21. 152
  22. 164
  23. 64
  24. 172
  25. 168
  26. 160
  27. 212
  28. 128
  29. 248
  30. 296
  31. 72
  32. 144
  33. 248
  34. 272
  35. 304
  36. 264
  37. 136
  38. 120
  39. 80
  40. 88

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