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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 48 · 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. 1.39 × 8 =
  2. 2.12 × 4 =
  3. 3.17 × 8 =
  4. 4.22 × 4 =
  5. 5.56 × 4 =
  6. 6.40 × 8 =
  7. 7.42 × 4 =
  8. 8.27 × 8 =
  9. 9.24 × 8 =
  10. 10.65 × 4 =
  11. 11.18 × 8 =
  12. 12.28 × 8 =
  13. 13.36 × 8 =
  14. 14.46 × 4 =
  15. 15.64 × 4 =
  16. 16.23 × 8 =
  17. 17.62 × 4 =
  18. 18.34 × 8 =
  19. 19.18 × 4 =
  20. 20.37 × 4 =
  21. 21.69 × 4 =
  22. 22.34 × 4 =
  23. 23.33 × 4 =
  24. 24.22 × 8 =
  25. 25.58 × 4 =
  26. 26.20 × 8 =
  27. 27.12 × 8 =
  28. 28.36 × 4 =
  29. 29.30 × 8 =
  30. 30.28 × 4 =
  31. 31.35 × 8 =
  32. 32.15 × 4 =
  33. 33.15 × 8 =
  34. 34.40 × 4 =
  35. 35.16 × 8 =
  36. 36.48 × 4 =
  37. 37.14 × 8 =
  38. 38.29 × 8 =
  39. 39.57 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 312
  2. 48
  3. 136
  4. 88
  5. 224
  6. 320
  7. 168
  8. 216
  9. 192
  10. 260
  11. 144
  12. 224
  13. 288
  14. 184
  15. 256
  16. 184
  17. 248
  18. 272
  19. 72
  20. 148
  21. 276
  22. 136
  23. 132
  24. 176
  25. 232
  26. 160
  27. 96
  28. 144
  29. 240
  30. 112
  31. 280
  32. 60
  33. 120
  34. 160
  35. 128
  36. 192
  37. 112
  38. 232
  39. 228
  40. 296

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