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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 997 · 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. 2.59 × 4 =
  3. 3.36 × 8 =
  4. 4.68 × 4 =
  5. 5.39 × 4 =
  6. 6.35 × 4 =
  7. 7.71 × 4 =
  8. 8.65 × 4 =
  9. 9.14 × 4 =
  10. 10.40 × 8 =
  11. 11.57 × 4 =
  12. 12.20 × 8 =
  13. 13.43 × 4 =
  14. 14.12 × 4 =
  15. 15.28 × 8 =
  16. 16.21 × 4 =
  17. 17.33 × 8 =
  18. 18.74 × 4 =
  19. 19.19 × 4 =
  20. 20.31 × 4 =
  21. 21.37 × 8 =
  22. 22.45 × 4 =
  23. 23.14 × 8 =
  24. 24.13 × 4 =
  25. 25.18 × 8 =
  26. 26.16 × 4 =
  27. 27.41 × 4 =
  28. 28.70 × 4 =
  29. 29.29 × 4 =
  30. 30.64 × 4 =
  31. 31.37 × 4 =
  32. 32.15 × 4 =
  33. 33.16 × 8 =
  34. 34.60 × 4 =
  35. 35.31 × 8 =
  36. 36.38 × 4 =
  37. 37.24 × 8 =
  38. 38.24 × 4 =
  39. 39.12 × 8 =
  40. 40.54 × 4 =

Answer key

  1. 216
  2. 236
  3. 288
  4. 272
  5. 156
  6. 140
  7. 284
  8. 260
  9. 56
  10. 320
  11. 228
  12. 160
  13. 172
  14. 48
  15. 224
  16. 84
  17. 264
  18. 296
  19. 76
  20. 124
  21. 296
  22. 180
  23. 112
  24. 52
  25. 144
  26. 64
  27. 164
  28. 280
  29. 116
  30. 256
  31. 148
  32. 60
  33. 128
  34. 240
  35. 248
  36. 152
  37. 192
  38. 96
  39. 96
  40. 216

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