Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 285 · 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. 1.20 × 8 =
2. 2.49 × 15 =
3. 3.₹83.10 − ₹19.30 =
4. 4.140 × 4 =
5. 5.15% of 600 =
6. 6.435 − 29 =
7. 7.451 + 17 =
8. 8.₹67.65 + ₹27.20 =
9. 9.19² =
10. 10.16 × 5 =
11. 11.Best estimate of 698 × 4? (a) 280 (b) 28000 (c) 5600 (d) 2800
12. 12.₹30.25 − ₹20.80 =
13. 13.88 − 77 =
14. 14.191 − 97 =
15. 15.13 × 15 =
16. 16.₹20.55 − ₹6.30 =
17. 17.449 + 39 =
18. 18.₹15.55 + ₹45.35 =
19. 19.Check with nines: 19 × 53 = 1014. Correct or wrong? (a) wrong (b) correct
20. 20.79² =
21. 21.Check with nines: 30 × 91 = 2733. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 546 + 137 = 683. Correct or wrong? (a) correct (b) wrong
23. 23.83 × 4 =
24. 24.Check with nines: 667 + 330 = 997. Correct or wrong? (a) correct (b) wrong
25. 25.5 × 15 =
26. 26.Best estimate of 89 × 92? (a) 810 (b) 16200 (c) 81000 (d) 8100
27. 27.13 × 8 =
28. 28.Check with nines: 28 × 59 = 1652. Correct or wrong? (a) correct (b) wrong
29. 29.₹85.40 + ₹38.30 =
30. 30.18 + 42 + 33 + 50 =
31. 31.98 × 5 =
32. 32.275 + 58 =
33. 33.1150 ÷ 25 =
34. 34.950 ÷ 25 =
35. 35.148 × 4 =
36. 36.56 × 8 =
37. 37.539 − 88 =
38. 38.Check with nines: 37 × 94 = 3472. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 614 + 359 = 968. Correct or wrong? (a) wrong (b) correct
40. 40.415 ÷ 5 =

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