Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 119 · 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. 1.45 × 15 =
2. 2.Check with nines: 202 + 207 = 409. Correct or wrong? (a) correct (b) wrong
3. 3.14 × 12 =
4. 4.Check with nines: 14 × 81 = 1127. Correct or wrong? (a) correct (b) wrong
5. 5.20 × 50 =
6. 6.44 × 15 =
7. 7.366 − 57 =
8. 8.9 + 5 + 2 + 7 + 1 =
9. 9.42 × 15 =
10. 10.41² =
11. 11.₹25.05 − ₹18.70 =
12. 12.70 × 5 =
13. 13.39 + 20 + 11 + 45 =
14. 14.38 × 8 =
15. 15.95 × 50 =
16. 16.15 × 14 =
17. 17.50 + 39 =
18. 18.8 × 15 =
19. 19.91² =
20. 20.6 + 6 + 2 + 4 + 9 =
21. 21.61² =
22. 22.62 + 69 + 36 + 28 =
23. 23.79 + 44 + 21 + 23 =
24. 24.91² =
25. 25.Best estimate of 41 × 68? (a) 28000 (b) 5600 (c) 2800 (d) 280
26. 26.3 + 2 + 8 + 2 + 2 =
27. 27.1550 ÷ 50 =
28. 28.1 + 2 + 5 + 5 + 6 =
29. 29.59² =
30. 30.Check with nines: 916 + 484 = 1401. Correct or wrong? (a) wrong (b) correct
31. 31.69² =
32. 32.62 × 15 =
33. 33.29 + 79 + 49 + 49 =
34. 34.Check with nines: 19 × 30 = 576. Correct or wrong? (a) correct (b) wrong
35. 35.31 × 15 =
36. 36.Check with nines: 58 × 30 = 1740. Correct or wrong? (a) wrong (b) correct
37. 37.80 × 50 =
38. 38.29² =
39. 39.₹32.70 − ₹9.75 =
40. 40.419 − 98 =

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