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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 456 · 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. 1.12 × 8 =
  2. 2.49 × 4 =
  3. 3.34 × 4 =
  4. 4.15 × 8 =
  5. 5.39 × 4 =
  6. 6.73 × 4 =
  7. 7.67 × 4 =
  8. 8.55 × 4 =
  9. 9.33 × 4 =
  10. 10.24 × 8 =
  11. 11.26 × 8 =
  12. 12.32 × 8 =
  13. 13.20 × 8 =
  14. 14.19 × 8 =
  15. 15.65 × 4 =
  16. 16.37 × 8 =
  17. 17.16 × 8 =
  18. 18.21 × 8 =
  19. 19.29 × 8 =
  20. 20.23 × 8 =
  21. 21.31 × 8 =
  22. 22.28 × 8 =
  23. 23.74 × 4 =
  24. 24.38 × 8 =
  25. 25.27 × 8 =
  26. 26.26 × 4 =
  27. 27.61 × 4 =
  28. 28.34 × 8 =
  29. 29.69 × 4 =
  30. 30.36 × 4 =
  31. 31.21 × 4 =
  32. 32.25 × 4 =
  33. 33.22 × 4 =
  34. 34.57 × 4 =
  35. 35.31 × 4 =
  36. 36.66 × 4 =
  37. 37.32 × 4 =
  38. 38.29 × 4 =
  39. 39.70 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 96
  2. 196
  3. 136
  4. 120
  5. 156
  6. 292
  7. 268
  8. 220
  9. 132
  10. 192
  11. 208
  12. 256
  13. 160
  14. 152
  15. 260
  16. 296
  17. 128
  18. 168
  19. 232
  20. 184
  21. 248
  22. 224
  23. 296
  24. 304
  25. 216
  26. 104
  27. 244
  28. 272
  29. 276
  30. 144
  31. 84
  32. 100
  33. 88
  34. 228
  35. 124
  36. 264
  37. 128
  38. 116
  39. 280
  40. 172

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