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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 984 · 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. 1.35 × 8 =
  2. 2.40 × 4 =
  3. 3.26 × 8 =
  4. 4.12 × 4 =
  5. 5.18 × 8 =
  6. 6.44 × 4 =
  7. 7.39 × 4 =
  8. 8.27 × 4 =
  9. 9.14 × 4 =
  10. 10.20 × 8 =
  11. 11.26 × 4 =
  12. 12.13 × 4 =
  13. 13.21 × 8 =
  14. 14.14 × 8 =
  15. 15.24 × 4 =
  16. 16.23 × 4 =
  17. 17.27 × 8 =
  18. 18.74 × 4 =
  19. 19.30 × 8 =
  20. 20.68 × 4 =
  21. 21.32 × 4 =
  22. 22.55 × 4 =
  23. 23.32 × 8 =
  24. 24.40 × 8 =
  25. 25.58 × 4 =
  26. 26.24 × 8 =
  27. 27.59 × 4 =
  28. 28.16 × 8 =
  29. 29.48 × 4 =
  30. 30.15 × 8 =
  31. 31.60 × 4 =
  32. 32.54 × 4 =
  33. 33.37 × 4 =
  34. 34.12 × 8 =
  35. 35.43 × 4 =
  36. 36.62 × 4 =
  37. 37.34 × 8 =
  38. 38.53 × 4 =
  39. 39.19 × 8 =
  40. 40.49 × 4 =

Answer key

  1. 280
  2. 160
  3. 208
  4. 48
  5. 144
  6. 176
  7. 156
  8. 108
  9. 56
  10. 160
  11. 104
  12. 52
  13. 168
  14. 112
  15. 96
  16. 92
  17. 216
  18. 296
  19. 240
  20. 272
  21. 128
  22. 220
  23. 256
  24. 320
  25. 232
  26. 192
  27. 236
  28. 128
  29. 192
  30. 120
  31. 240
  32. 216
  33. 148
  34. 96
  35. 172
  36. 248
  37. 272
  38. 212
  39. 152
  40. 196

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