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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 592 · 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. 1.33 × 8 =
  2. 2.30 × 8 =
  3. 3.17 × 4 =
  4. 4.26 × 4 =
  5. 5.33 × 4 =
  6. 6.16 × 4 =
  7. 7.16 × 8 =
  8. 8.29 × 8 =
  9. 9.13 × 4 =
  10. 10.12 × 4 =
  11. 11.15 × 8 =
  12. 12.61 × 4 =
  13. 13.13 × 8 =
  14. 14.24 × 8 =
  15. 15.21 × 4 =
  16. 16.35 × 8 =
  17. 17.67 × 4 =
  18. 18.34 × 4 =
  19. 19.65 × 4 =
  20. 20.20 × 8 =
  21. 21.25 × 8 =
  22. 22.23 × 4 =
  23. 23.53 × 4 =
  24. 24.70 × 4 =
  25. 25.36 × 8 =
  26. 26.60 × 4 =
  27. 27.41 × 4 =
  28. 28.31 × 8 =
  29. 29.42 × 4 =
  30. 30.57 × 4 =
  31. 31.18 × 4 =
  32. 32.22 × 8 =
  33. 33.35 × 4 =
  34. 34.40 × 8 =
  35. 35.75 × 4 =
  36. 36.51 × 4 =
  37. 37.18 × 8 =
  38. 38.34 × 8 =
  39. 39.56 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 264
  2. 240
  3. 68
  4. 104
  5. 132
  6. 64
  7. 128
  8. 232
  9. 52
  10. 48
  11. 120
  12. 244
  13. 104
  14. 192
  15. 84
  16. 280
  17. 268
  18. 136
  19. 260
  20. 160
  21. 200
  22. 92
  23. 212
  24. 280
  25. 288
  26. 240
  27. 164
  28. 248
  29. 168
  30. 228
  31. 72
  32. 176
  33. 140
  34. 320
  35. 300
  36. 204
  37. 144
  38. 272
  39. 224
  40. 272

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