Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 719 · 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. 1.35 × 5 =
2. 2.125 × 4 =
3. 3.₹55.95 + ₹35.35 =
4. 4.20% of 110 =
5. 5.20% of 880 =
6. 6.Best estimate of 79 × 79? (a) 64000 (b) 6400 (c) 12800 (d) 640
7. 7.69² =
8. 8.417 − 17 =
9. 9.Check with nines: 815 + 920 = 1735. Correct or wrong? (a) correct (b) wrong
10. 10.42 + 15 + 52 + 36 =
11. 11.37 × 8 =
12. 12.Best estimate of 197 × 5? (a) 100 (b) 1000 (c) 10000 (d) 2000
13. 13.401 + 17 =
14. 14.57 + 67 + 26 + 21 =
15. 15.66 + 56 + 68 + 67 =
16. 16.45 + 38 =
17. 17.₹26.65 + ₹9.65 =
18. 18.405 + 79 =
19. 19.₹12.10 + ₹25.60 =
20. 20.19 × 14 =
21. 21.79² =
22. 22.Check with nines: 63 × 21 = 1323. Correct or wrong? (a) wrong (b) correct
23. 23.341 − 87 =
24. 24.1 + 6 + 6 + 9 =
25. 25.96 × 50 =
26. 26.1 + 9 + 9 + 8 =
27. 27.41 + 30 + 51 + 11 =
28. 28.57 + 19 + 33 + 26 =
29. 29.8 + 5 + 1 + 4 + 5 =
30. 30.375 + 69 =
31. 31.56 × 15 =
32. 32.Best estimate of 32 × 68? (a) 2100 (b) 210 (c) 21000 (d) 4200
33. 33.100 × 4 =
34. 34.Best estimate of 28 × 68? (a) 4200 (b) 210 (c) 21000 (d) 2100
35. 35.Check with nines: 52 × 74 = 3848. Correct or wrong? (a) correct (b) wrong
36. 36.83 + 71 + 62 + 36 =
37. 37.98 + 49 =
38. 38.46 × 15 =
39. 39.32 × 4 =
40. 40.29 × 8 =

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