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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 792 · 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. 1.43 × 4 =
  2. 2.18 × 8 =
  3. 3.17 × 8 =
  4. 4.26 × 4 =
  5. 5.66 × 4 =
  6. 6.35 × 8 =
  7. 7.54 × 4 =
  8. 8.42 × 4 =
  9. 9.13 × 8 =
  10. 10.69 × 4 =
  11. 11.67 × 4 =
  12. 12.55 × 4 =
  13. 13.40 × 4 =
  14. 14.47 × 4 =
  15. 15.19 × 4 =
  16. 16.61 × 4 =
  17. 17.65 × 4 =
  18. 18.14 × 4 =
  19. 19.34 × 8 =
  20. 20.21 × 4 =
  21. 21.37 × 4 =
  22. 22.39 × 8 =
  23. 23.64 × 4 =
  24. 24.20 × 8 =
  25. 25.19 × 8 =
  26. 26.71 × 4 =
  27. 27.14 × 8 =
  28. 28.49 × 4 =
  29. 29.23 × 4 =
  30. 30.16 × 8 =
  31. 31.27 × 8 =
  32. 32.45 × 4 =
  33. 33.60 × 4 =
  34. 34.38 × 8 =
  35. 35.70 × 4 =
  36. 36.72 × 4 =
  37. 37.36 × 4 =
  38. 38.36 × 8 =
  39. 39.33 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 172
  2. 144
  3. 136
  4. 104
  5. 264
  6. 280
  7. 216
  8. 168
  9. 104
  10. 276
  11. 268
  12. 220
  13. 160
  14. 188
  15. 76
  16. 244
  17. 260
  18. 56
  19. 272
  20. 84
  21. 148
  22. 312
  23. 256
  24. 160
  25. 152
  26. 284
  27. 112
  28. 196
  29. 92
  30. 128
  31. 216
  32. 180
  33. 240
  34. 304
  35. 280
  36. 288
  37. 144
  38. 288
  39. 132
  40. 108

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