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Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 320 · 40 questions
TalentJR

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

NameDateTime takenScore ___ / 40
  1. 1.46 × 15 =
  2. 2.1% of 510 =
  3. 3.61 + 69 + 81 + 29 =
  4. 4.550 ÷ 50 =
  5. 5.328 + 97 =
  6. 6.25% of 360 =
  7. 7.383 + 48 =
  8. 8.5% of 130 =
  9. 9.700 ÷ 50 =
  10. 10.₹84.50 + ₹21.70 =
  11. 11.51² =
  12. 12.Best estimate of 29 × 41? (a) 1200 (b) 12000 (c) 120 (d) 2400
  13. 13.155 − 78 =
  14. 14.114 − 86 =
  15. 15.8 + 9 + 6 + 6 + 4 =
  16. 16.91² =
  17. 17.Best estimate of 603 × 9? (a) 5400 (b) 54000 (c) 540 (d) 10800
  18. 18.97 × 5 =
  19. 19.15% of 770 =
  20. 20.57 × 8 =
  21. 21.29² =
  22. 22.155 − 69 =
  23. 23.501 − 46 =
  24. 24.43 × 50 =
  25. 25.22 × 15 =
  26. 26.Best estimate of 52 × 38? (a) 2000 (b) 20000 (c) 200 (d) 4000
  27. 27.Check with nines: 24 × 97 = 2328. Correct or wrong? (a) wrong (b) correct
  28. 28.51² =
  29. 29.186 − 18 =
  30. 30.Check with nines: 552 + 744 = 1296. Correct or wrong? (a) wrong (b) correct
  31. 31.7 + 3 + 1 + 1 =
  32. 32.4 + 7 + 5 + 3 + 8 =
  33. 33.5% of 630 =
  34. 34.412 − 78 =
  35. 35.9 + 1 + 3 + 8 =
  36. 36.1700 ÷ 50 =
  37. 37.₹90.45 + ₹2.75 =
  38. 38.3 + 4 + 6 + 3 =
  39. 39.695 ÷ 5 =
  40. 40.74 − 46 =

Answer key

  1. 690
  2. 5.1
  3. 240
  4. 11
  5. 425
  6. 90
  7. 431
  8. 6.5
  9. 14
  10. 106.2
  11. 2601
  12. 1200
  13. 77
  14. 28
  15. 33
  16. 8281
  17. 5400
  18. 485
  19. 115.5
  20. 456
  21. 841
  22. 86
  23. 455
  24. 2150
  25. 330
  26. 2000
  27. correct
  28. 2601
  29. 168
  30. correct
  31. 12
  32. 27
  33. 31.5
  34. 334
  35. 21
  36. 34
  37. 93.2
  38. 16
  39. 139
  40. 28

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