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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 947 · 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. 1.26 × 8 =
  2. 2.57 × 4 =
  3. 3.23 × 4 =
  4. 4.15 × 8 =
  5. 5.67 × 4 =
  6. 6.32 × 8 =
  7. 7.17 × 4 =
  8. 8.14 × 8 =
  9. 9.31 × 4 =
  10. 10.39 × 4 =
  11. 11.46 × 4 =
  12. 12.24 × 8 =
  13. 13.33 × 8 =
  14. 14.33 × 4 =
  15. 15.20 × 8 =
  16. 16.27 × 8 =
  17. 17.13 × 4 =
  18. 18.18 × 8 =
  19. 19.21 × 8 =
  20. 20.61 × 4 =
  21. 21.35 × 8 =
  22. 22.65 × 4 =
  23. 23.34 × 8 =
  24. 24.36 × 4 =
  25. 25.22 × 4 =
  26. 26.29 × 8 =
  27. 27.75 × 4 =
  28. 28.32 × 4 =
  29. 29.53 × 4 =
  30. 30.37 × 8 =
  31. 31.28 × 4 =
  32. 32.69 × 4 =
  33. 33.36 × 8 =
  34. 34.25 × 8 =
  35. 35.21 × 4 =
  36. 36.59 × 4 =
  37. 37.28 × 8 =
  38. 38.39 × 8 =
  39. 39.25 × 4 =
  40. 40.16 × 8 =

Answer key

  1. 208
  2. 228
  3. 92
  4. 120
  5. 268
  6. 256
  7. 68
  8. 112
  9. 124
  10. 156
  11. 184
  12. 192
  13. 264
  14. 132
  15. 160
  16. 216
  17. 52
  18. 144
  19. 168
  20. 244
  21. 280
  22. 260
  23. 272
  24. 144
  25. 88
  26. 232
  27. 300
  28. 128
  29. 212
  30. 296
  31. 112
  32. 276
  33. 288
  34. 200
  35. 84
  36. 236
  37. 224
  38. 312
  39. 100
  40. 128

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