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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 970 · 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. 1.45 × 4 =
  2. 2.12 × 8 =
  3. 3.56 × 4 =
  4. 4.20 × 8 =
  5. 5.26 × 8 =
  6. 6.72 × 4 =
  7. 7.24 × 8 =
  8. 8.20 × 4 =
  9. 9.54 × 4 =
  10. 10.62 × 4 =
  11. 11.21 × 8 =
  12. 12.16 × 4 =
  13. 13.52 × 4 =
  14. 14.32 × 8 =
  15. 15.67 × 4 =
  16. 16.13 × 8 =
  17. 17.38 × 8 =
  18. 18.31 × 8 =
  19. 19.18 × 8 =
  20. 20.35 × 4 =
  21. 21.55 × 4 =
  22. 22.23 × 8 =
  23. 23.37 × 4 =
  24. 24.34 × 8 =
  25. 25.31 × 4 =
  26. 26.21 × 4 =
  27. 27.15 × 8 =
  28. 28.40 × 8 =
  29. 29.33 × 8 =
  30. 30.71 × 4 =
  31. 31.26 × 4 =
  32. 32.12 × 4 =
  33. 33.33 × 4 =
  34. 34.75 × 4 =
  35. 35.16 × 8 =
  36. 36.68 × 4 =
  37. 37.14 × 4 =
  38. 38.60 × 4 =
  39. 39.27 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 180
  2. 96
  3. 224
  4. 160
  5. 208
  6. 288
  7. 192
  8. 80
  9. 216
  10. 248
  11. 168
  12. 64
  13. 208
  14. 256
  15. 268
  16. 104
  17. 304
  18. 248
  19. 144
  20. 140
  21. 220
  22. 184
  23. 148
  24. 272
  25. 124
  26. 84
  27. 120
  28. 320
  29. 264
  30. 284
  31. 104
  32. 48
  33. 132
  34. 300
  35. 128
  36. 272
  37. 56
  38. 240
  39. 108
  40. 136

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