← 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 248 · 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. 1.30 × 4 =
  2. 2.33 × 8 =
  3. 3.28 × 8 =
  4. 4.34 × 4 =
  5. 5.14 × 4 =
  6. 6.49 × 4 =
  7. 7.63 × 4 =
  8. 8.66 × 4 =
  9. 9.20 × 8 =
  10. 10.13 × 8 =
  11. 11.64 × 4 =
  12. 12.32 × 8 =
  13. 13.36 × 8 =
  14. 14.48 × 4 =
  15. 15.40 × 4 =
  16. 16.34 × 8 =
  17. 17.16 × 8 =
  18. 18.27 × 8 =
  19. 19.43 × 4 =
  20. 20.30 × 8 =
  21. 21.19 × 8 =
  22. 22.39 × 4 =
  23. 23.26 × 8 =
  24. 24.12 × 8 =
  25. 25.14 × 8 =
  26. 26.23 × 8 =
  27. 27.31 × 4 =
  28. 28.62 × 4 =
  29. 29.16 × 4 =
  30. 30.45 × 4 =
  31. 31.44 × 4 =
  32. 32.21 × 8 =
  33. 33.50 × 4 =
  34. 34.22 × 8 =
  35. 35.35 × 4 =
  36. 36.71 × 4 =
  37. 37.74 × 4 =
  38. 38.75 × 4 =
  39. 39.37 × 8 =
  40. 40.65 × 4 =

Answer key

  1. 120
  2. 264
  3. 224
  4. 136
  5. 56
  6. 196
  7. 252
  8. 264
  9. 160
  10. 104
  11. 256
  12. 256
  13. 288
  14. 192
  15. 160
  16. 272
  17. 128
  18. 216
  19. 172
  20. 240
  21. 152
  22. 156
  23. 208
  24. 96
  25. 112
  26. 184
  27. 124
  28. 248
  29. 64
  30. 180
  31. 176
  32. 168
  33. 200
  34. 176
  35. 140
  36. 284
  37. 296
  38. 300
  39. 296
  40. 260

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