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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 901 · 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. 1.37 × 4 =
  2. 2.45 × 4 =
  3. 3.53 × 4 =
  4. 4.31 × 4 =
  5. 5.57 × 4 =
  6. 6.34 × 8 =
  7. 7.24 × 4 =
  8. 8.40 × 8 =
  9. 9.62 × 4 =
  10. 10.42 × 4 =
  11. 11.28 × 8 =
  12. 12.68 × 4 =
  13. 13.18 × 8 =
  14. 14.14 × 8 =
  15. 15.65 × 4 =
  16. 16.38 × 4 =
  17. 17.44 × 4 =
  18. 18.24 × 8 =
  19. 19.30 × 8 =
  20. 20.55 × 4 =
  21. 21.23 × 8 =
  22. 22.64 × 4 =
  23. 23.13 × 4 =
  24. 24.27 × 4 =
  25. 25.15 × 4 =
  26. 26.15 × 8 =
  27. 27.48 × 4 =
  28. 28.21 × 8 =
  29. 29.32 × 4 =
  30. 30.28 × 4 =
  31. 31.16 × 8 =
  32. 32.34 × 4 =
  33. 33.17 × 8 =
  34. 34.70 × 4 =
  35. 35.61 × 4 =
  36. 36.51 × 4 =
  37. 37.18 × 4 =
  38. 38.40 × 4 =
  39. 39.19 × 8 =
  40. 40.35 × 4 =

Answer key

  1. 148
  2. 180
  3. 212
  4. 124
  5. 228
  6. 272
  7. 96
  8. 320
  9. 248
  10. 168
  11. 224
  12. 272
  13. 144
  14. 112
  15. 260
  16. 152
  17. 176
  18. 192
  19. 240
  20. 220
  21. 184
  22. 256
  23. 52
  24. 108
  25. 60
  26. 120
  27. 192
  28. 168
  29. 128
  30. 112
  31. 128
  32. 136
  33. 136
  34. 280
  35. 244
  36. 204
  37. 72
  38. 160
  39. 152
  40. 140

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