Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 298 · 40 questions

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.

1. 1.6 × 15 =
2. 2.56 × 8 =
3. 3.337 − 96 =
4. 4.175 + 97 =
5. 5.Check with nines: 34 × 45 = 1528. Correct or wrong? (a) wrong (b) correct
6. 6.576 − 17 =
7. 7.Best estimate of 88 × 78? (a) 14400 (b) 72000 (c) 720 (d) 7200
8. 8.12 × 16 =
9. 9.Check with nines: 457 + 501 = 957. Correct or wrong? (a) wrong (b) correct
10. 10.25 × 5 =
11. 11.Check with nines: 217 + 796 = 1019. Correct or wrong? (a) correct (b) wrong
12. 12.15 × 17 =
13. 13.10% of 450 =
14. 14.28 + 21 + 26 + 52 =
15. 15.15 × 17 =
16. 16.54 × 5 =
17. 17.81² =
18. 18.550 ÷ 5 =
19. 19.16 × 50 =
20. 20.346 + 29 =
21. 21.5 + 8 + 6 + 2 =
22. 22.9 + 3 + 1 + 1 =
23. 23.78 + 17 =
24. 24.5% of 80 =
25. 25.Best estimate of 39 × 19? (a) 8000 (b) 800 (c) 80 (d) 1600
26. 26.5 + 7 + 3 + 5 + 6 =
27. 27.Check with nines: 68 × 50 = 3400. Correct or wrong? (a) wrong (b) correct
28. 28.327 − 46 =
29. 29.28 × 50 =
30. 30.38 + 97 =
31. 31.109 + 99 =
32. 32.58 × 50 =
33. 33.68 + 23 + 30 + 30 =
34. 34.183 − 38 =
35. 35.208 − 39 =
36. 36.25 + 43 + 43 + 25 =
37. 37.Check with nines: 68 × 77 = 5236. Correct or wrong? (a) correct (b) wrong
38. 38.715 ÷ 5 =
39. 39.Best estimate of 301 × 9? (a) 2700 (b) 27000 (c) 270 (d) 5400
40. 40.15% of 40 =

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