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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 47 · 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. 1.22 × 4 =
  2. 2.48 × 4 =
  3. 3.19 × 8 =
  4. 4.69 × 4 =
  5. 5.36 × 8 =
  6. 6.68 × 4 =
  7. 7.71 × 4 =
  8. 8.38 × 8 =
  9. 9.20 × 8 =
  10. 10.12 × 8 =
  11. 11.54 × 4 =
  12. 12.73 × 4 =
  13. 13.45 × 4 =
  14. 14.28 × 8 =
  15. 15.63 × 4 =
  16. 16.35 × 8 =
  17. 17.20 × 4 =
  18. 18.43 × 4 =
  19. 19.18 × 8 =
  20. 20.66 × 4 =
  21. 21.27 × 8 =
  22. 22.26 × 8 =
  23. 23.60 × 4 =
  24. 24.74 × 4 =
  25. 25.44 × 4 =
  26. 26.35 × 4 =
  27. 27.37 × 4 =
  28. 28.59 × 4 =
  29. 29.55 × 4 =
  30. 30.17 × 8 =
  31. 31.21 × 8 =
  32. 32.30 × 8 =
  33. 33.40 × 4 =
  34. 34.31 × 8 =
  35. 35.16 × 4 =
  36. 36.67 × 4 =
  37. 37.50 × 4 =
  38. 38.23 × 8 =
  39. 39.33 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 88
  2. 192
  3. 152
  4. 276
  5. 288
  6. 272
  7. 284
  8. 304
  9. 160
  10. 96
  11. 216
  12. 292
  13. 180
  14. 224
  15. 252
  16. 280
  17. 80
  18. 172
  19. 144
  20. 264
  21. 216
  22. 208
  23. 240
  24. 296
  25. 176
  26. 140
  27. 148
  28. 236
  29. 220
  30. 136
  31. 168
  32. 240
  33. 160
  34. 248
  35. 64
  36. 268
  37. 200
  38. 184
  39. 132
  40. 100

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