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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 975 · 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. 1.22 × 4 =
  2. 2.26 × 4 =
  3. 3.29 × 8 =
  4. 4.37 × 4 =
  5. 5.36 × 8 =
  6. 6.52 × 4 =
  7. 7.14 × 8 =
  8. 8.35 × 8 =
  9. 9.20 × 4 =
  10. 10.19 × 8 =
  11. 11.38 × 8 =
  12. 12.72 × 4 =
  13. 13.30 × 4 =
  14. 14.62 × 4 =
  15. 15.26 × 8 =
  16. 16.36 × 4 =
  17. 17.37 × 8 =
  18. 18.18 × 4 =
  19. 19.40 × 8 =
  20. 20.57 × 4 =
  21. 21.49 × 4 =
  22. 22.46 × 4 =
  23. 23.16 × 8 =
  24. 24.17 × 8 =
  25. 25.22 × 8 =
  26. 26.29 × 4 =
  27. 27.28 × 4 =
  28. 28.48 × 4 =
  29. 29.12 × 8 =
  30. 30.21 × 4 =
  31. 31.43 × 4 =
  32. 32.63 × 4 =
  33. 33.39 × 8 =
  34. 34.45 × 4 =
  35. 35.71 × 4 =
  36. 36.34 × 8 =
  37. 37.21 × 8 =
  38. 38.65 × 4 =
  39. 39.31 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 88
  2. 104
  3. 232
  4. 148
  5. 288
  6. 208
  7. 112
  8. 280
  9. 80
  10. 152
  11. 304
  12. 288
  13. 120
  14. 248
  15. 208
  16. 144
  17. 296
  18. 72
  19. 320
  20. 228
  21. 196
  22. 184
  23. 128
  24. 136
  25. 176
  26. 116
  27. 112
  28. 192
  29. 96
  30. 84
  31. 172
  32. 252
  33. 312
  34. 180
  35. 284
  36. 272
  37. 168
  38. 260
  39. 248
  40. 224

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