Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 87 · 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.Check with nines: 88 × 45 = 3960. Correct or wrong? (a) wrong (b) correct
2. 2.27 × 15 =
3. 3.77 × 4 =
4. 4.Check with nines: 18 × 59 = 1062. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 796 + 122 = 919. Correct or wrong? (a) wrong (b) correct
6. 6.12 × 12 =
7. 7.150 − 77 =
8. 8.473 + 49 =
9. 9.113 − 16 =
10. 10.Best estimate of 49 × 89? (a) 9000 (b) 450 (c) 45000 (d) 4500
11. 11.₹34.80 − ₹17.70 =
12. 12.28 + 36 + 13 + 33 =
13. 13.41² =
14. 14.1% of 160 =
15. 15.79 × 5 =
16. 16.570 − 29 =
17. 17.39 × 15 =
18. 18.Best estimate of 61 × 29? (a) 180 (b) 1800 (c) 18000 (d) 3600
19. 19.5% of 880 =
20. 20.21² =
21. 21.295 ÷ 5 =
22. 22.50% of 740 =
23. 23.Best estimate of 797 × 3? (a) 24000 (b) 4800 (c) 240 (d) 2400
24. 24.12 × 14 =
25. 25.24 × 15 =
26. 26.39² =
27. 27.232 + 77 =
28. 28.Best estimate of 71 × 38? (a) 28000 (b) 280 (c) 5600 (d) 2800
29. 29.Check with nines: 698 + 205 = 903. Correct or wrong? (a) correct (b) wrong
30. 30.19 × 13 =
31. 31.51² =
32. 32.75 ÷ 25 =
33. 33.54 × 15 =
34. 34.9 + 5 + 7 + 3 + 6 =
35. 35.₹53.75 − ₹24.25 =
36. 36.23 × 15 =
37. 37.89² =
38. 38.10% of 610 =
39. 39.₹82.90 − ₹13.30 =
40. 40.Check with nines: 279 + 370 = 646. Correct or wrong? (a) wrong (b) correct

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