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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 897 · 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. 1.18 × 8 =
  2. 2.55 × 4 =
  3. 3.14 × 8 =
  4. 4.63 × 4 =
  5. 5.62 × 4 =
  6. 6.73 × 4 =
  7. 7.30 × 8 =
  8. 8.13 × 4 =
  9. 9.44 × 4 =
  10. 10.16 × 8 =
  11. 11.69 × 4 =
  12. 12.61 × 4 =
  13. 13.70 × 4 =
  14. 14.12 × 8 =
  15. 15.65 × 4 =
  16. 16.20 × 8 =
  17. 17.27 × 8 =
  18. 18.71 × 4 =
  19. 19.48 × 4 =
  20. 20.26 × 4 =
  21. 21.54 × 4 =
  22. 22.34 × 4 =
  23. 23.25 × 4 =
  24. 24.39 × 8 =
  25. 25.40 × 4 =
  26. 26.43 × 4 =
  27. 27.17 × 8 =
  28. 28.20 × 4 =
  29. 29.28 × 8 =
  30. 30.35 × 4 =
  31. 31.50 × 4 =
  32. 32.26 × 8 =
  33. 33.17 × 4 =
  34. 34.31 × 4 =
  35. 35.46 × 4 =
  36. 36.38 × 8 =
  37. 37.33 × 8 =
  38. 38.36 × 8 =
  39. 39.67 × 4 =
  40. 40.15 × 4 =

Answer key

  1. 144
  2. 220
  3. 112
  4. 252
  5. 248
  6. 292
  7. 240
  8. 52
  9. 176
  10. 128
  11. 276
  12. 244
  13. 280
  14. 96
  15. 260
  16. 160
  17. 216
  18. 284
  19. 192
  20. 104
  21. 216
  22. 136
  23. 100
  24. 312
  25. 160
  26. 172
  27. 136
  28. 80
  29. 224
  30. 140
  31. 200
  32. 208
  33. 68
  34. 124
  35. 184
  36. 304
  37. 264
  38. 288
  39. 268
  40. 60

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