Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 240 · 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. 1.501 − 59 =
2. 2.Check with nines: 81 × 70 = 5670. Correct or wrong? (a) wrong (b) correct
3. 3.2 + 2 + 1 + 7 + 8 =
4. 4.₹53.05 − ₹38.75 =
5. 5.16 × 13 =
6. 6.50% of 600 =
7. 7.62 × 15 =
8. 8.58 + 49 =
9. 9.1 + 5 + 5 + 5 =
10. 10.Best estimate of 21 × 38? (a) 800 (b) 1600 (c) 8000 (d) 80
11. 11.35 × 15 =
12. 12.87 − 49 =
13. 13.59² =
14. 14.25% of 430 =
15. 15.175 ÷ 25 =
16. 16.Best estimate of 58 × 71? (a) 420 (b) 42000 (c) 8400 (d) 4200
17. 17.4 + 8 + 4 + 6 + 1 =
18. 18.1 + 1 + 3 + 3 + 7 =
19. 19.49² =
20. 20.61 × 15 =
21. 21.15 × 14 =
22. 22.Check with nines: 798 + 312 = 1109. Correct or wrong? (a) correct (b) wrong
23. 23.298 + 17 =
24. 24.468 + 39 =
25. 25.2 + 9 + 3 + 8 =
26. 26.Check with nines: 51 × 78 = 3978. Correct or wrong? (a) wrong (b) correct
27. 27.39² =
28. 28.41² =
29. 29.26 × 8 =
30. 30.91² =
31. 31.1050 ÷ 50 =
32. 32.15 × 8 =
33. 33.800 ÷ 50 =
34. 34.13 × 17 =
35. 35.Check with nines: 48 × 20 = 964. Correct or wrong? (a) correct (b) wrong
36. 36.14 × 13 =
37. 37.Check with nines: 68 × 27 = 1836. Correct or wrong? (a) wrong (b) correct
38. 38.471 + 57 =
39. 39.35 × 4 =
40. 40.5% of 830 =

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