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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 36 · 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. 1.17 × 4 =
  2. 2.22 × 8 =
  3. 3.30 × 4 =
  4. 4.20 × 4 =
  5. 5.21 × 4 =
  6. 6.40 × 8 =
  7. 7.26 × 4 =
  8. 8.16 × 4 =
  9. 9.57 × 4 =
  10. 10.37 × 8 =
  11. 11.55 × 4 =
  12. 12.28 × 4 =
  13. 13.17 × 8 =
  14. 14.15 × 4 =
  15. 15.50 × 4 =
  16. 16.28 × 8 =
  17. 17.72 × 4 =
  18. 18.19 × 8 =
  19. 19.58 × 4 =
  20. 20.14 × 8 =
  21. 21.18 × 8 =
  22. 22.16 × 8 =
  23. 23.34 × 4 =
  24. 24.40 × 4 =
  25. 25.36 × 4 =
  26. 26.21 × 8 =
  27. 27.71 × 4 =
  28. 28.30 × 8 =
  29. 29.74 × 4 =
  30. 30.41 × 4 =
  31. 31.15 × 8 =
  32. 32.47 × 4 =
  33. 33.60 × 4 =
  34. 34.27 × 8 =
  35. 35.38 × 8 =
  36. 36.36 × 8 =
  37. 37.45 × 4 =
  38. 38.61 × 4 =
  39. 39.24 × 8 =
  40. 40.29 × 8 =

Answer key

  1. 68
  2. 176
  3. 120
  4. 80
  5. 84
  6. 320
  7. 104
  8. 64
  9. 228
  10. 296
  11. 220
  12. 112
  13. 136
  14. 60
  15. 200
  16. 224
  17. 288
  18. 152
  19. 232
  20. 112
  21. 144
  22. 128
  23. 136
  24. 160
  25. 144
  26. 168
  27. 284
  28. 240
  29. 296
  30. 164
  31. 120
  32. 188
  33. 240
  34. 216
  35. 304
  36. 288
  37. 180
  38. 244
  39. 192
  40. 232

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