Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 909 · 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. 1.31 + 20 + 29 + 78 =
2. 2.Check with nines: 59 × 63 = 3712. Correct or wrong? (a) correct (b) wrong
3. 3.14 × 14 =
4. 4.79 × 4 =
5. 5.36 × 4 =
6. 6.62 + 86 + 24 + 43 =
7. 7.Check with nines: 632 + 906 = 1538. Correct or wrong? (a) correct (b) wrong
8. 8.287 + 89 =
9. 9.280 − 69 =
10. 10.58 + 29 + 40 + 34 =
11. 11.69² =
12. 12.440 ÷ 5 =
13. 13.Check with nines: 936 + 829 = 1767. Correct or wrong? (a) correct (b) wrong
14. 14.29² =
15. 15.359 + 69 =
16. 16.Best estimate of 21 × 49? (a) 10000 (b) 2000 (c) 1000 (d) 100
17. 17.79 − 37 =
18. 18.3 + 2 + 8 + 2 + 1 =
19. 19.78 × 5 =
20. 20.580 − 87 =
21. 21.Best estimate of 79 × 91? (a) 72000 (b) 720 (c) 7200 (d) 14400
22. 22.90 + 67 =
23. 23.158 × 4 =
24. 24.450 ÷ 25 =
25. 25.14 × 14 =
26. 26.564 − 66 =
27. 27.5% of 150 =
28. 28.17 + 39 + 33 + 13 =
29. 29.Best estimate of 39 × 91? (a) 36000 (b) 7200 (c) 3600 (d) 360
30. 30.63 × 8 =
31. 31.31² =
32. 32.₹27.15 − ₹22.35 =
33. 33.17 × 15 =
34. 34.54 × 5 =
35. 35.1250 ÷ 50 =
36. 36.9 + 1 + 7 + 4 + 3 =
37. 37.201 − 37 =
38. 38.15 × 16 =
39. 39.41² =
40. 40.533 − 96 =

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