Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 825 · 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: 948 + 283 = 1239. Correct or wrong? (a) correct (b) wrong
2. 2.₹49.15 + ₹41.80 =
3. 3.8 + 4 + 1 + 6 =
4. 4.31² =
5. 5.40 × 15 =
6. 6.Best estimate of 28 × 79? (a) 4800 (b) 240 (c) 2400 (d) 24000
7. 7.₹89.80 − ₹17.20 =
8. 8.16 × 17 =
9. 9.Best estimate of 68 × 32? (a) 4200 (b) 21000 (c) 210 (d) 2100
10. 10.1% of 110 =
11. 11.17 × 15 =
12. 12.71² =
13. 13.42 × 8 =
14. 14.Best estimate of 32 × 81? (a) 2400 (b) 4800 (c) 24000 (d) 240
15. 15.16 × 15 =
16. 16.Best estimate of 399 × 8? (a) 320 (b) 32000 (c) 6400 (d) 3200
17. 17.349 + 27 =
18. 18.19² =
19. 19.Check with nines: 22 × 45 = 990. Correct or wrong? (a) correct (b) wrong
20. 20.₹77.75 + ₹45.30 =
21. 21.7 + 8 + 2 + 8 =
22. 22.43 × 15 =
23. 23.30 + 87 + 47 + 13 =
24. 24.₹37.30 − ₹25.15 =
25. 25.69² =
26. 26.21 + 28 + 28 + 32 =
27. 27.373 + 47 =
28. 28.₹42.25 − ₹31.85 =
29. 29.152 × 4 =
30. 30.Best estimate of 38 × 19? (a) 80 (b) 8000 (c) 800 (d) 1600
31. 31.63 + 12 + 79 + 18 =
32. 32.₹44.40 − ₹42.40 =
33. 33.1% of 370 =
34. 34.₹71.95 − ₹10.40 =
35. 35.19 × 17 =
36. 36.695 ÷ 5 =
37. 37.9 + 5 + 4 + 6 =
38. 38.3 + 7 + 9 + 1 =
39. 39.31² =
40. 40.55 × 5 =

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