← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 949 · 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. 1.44 × 4 =
  2. 2.34 × 4 =
  3. 3.25 × 4 =
  4. 4.54 × 4 =
  5. 5.25 × 8 =
  6. 6.30 × 8 =
  7. 7.13 × 8 =
  8. 8.18 × 4 =
  9. 9.64 × 4 =
  10. 10.62 × 4 =
  11. 11.14 × 8 =
  12. 12.28 × 8 =
  13. 13.65 × 4 =
  14. 14.38 × 4 =
  15. 15.16 × 8 =
  16. 16.39 × 8 =
  17. 17.16 × 4 =
  18. 18.58 × 4 =
  19. 19.31 × 8 =
  20. 20.26 × 4 =
  21. 21.74 × 4 =
  22. 22.35 × 4 =
  23. 23.40 × 4 =
  24. 24.63 × 4 =
  25. 25.41 × 4 =
  26. 26.23 × 8 =
  27. 27.24 × 4 =
  28. 28.15 × 8 =
  29. 29.36 × 4 =
  30. 30.53 × 4 =
  31. 31.57 × 4 =
  32. 32.30 × 4 =
  33. 33.26 × 8 =
  34. 34.31 × 4 =
  35. 35.27 × 8 =
  36. 36.45 × 4 =
  37. 37.29 × 4 =
  38. 38.19 × 4 =
  39. 39.75 × 4 =
  40. 40.34 × 8 =

Answer key

  1. 176
  2. 136
  3. 100
  4. 216
  5. 200
  6. 240
  7. 104
  8. 72
  9. 256
  10. 248
  11. 112
  12. 224
  13. 260
  14. 152
  15. 128
  16. 312
  17. 64
  18. 232
  19. 248
  20. 104
  21. 296
  22. 140
  23. 160
  24. 252
  25. 164
  26. 184
  27. 96
  28. 120
  29. 144
  30. 212
  31. 228
  32. 120
  33. 208
  34. 124
  35. 216
  36. 180
  37. 116
  38. 76
  39. 300
  40. 272

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths