Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 398 · 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: 838 + 812 = 1650. Correct or wrong? (a) wrong (b) correct
2. 2.4 + 6 + 7 + 9 + 2 =
3. 3.₹12.50 + ₹27.75 =
4. 4.Check with nines: 73 × 82 = 5979. Correct or wrong? (a) wrong (b) correct
5. 5.₹20.80 + ₹33.25 =
6. 6.15% of 360 =
7. 7.132 + 98 =
8. 8.6 + 6 + 2 + 4 =
9. 9.Best estimate of 798 × 3? (a) 24000 (b) 240 (c) 4800 (d) 2400
10. 10.1250 ÷ 25 =
11. 11.₹95.75 − ₹20.35 =
12. 12.49² =
13. 13.35 + 64 + 65 + 66 =
14. 14.150 ÷ 50 =
15. 15.23 + 51 + 31 + 44 =
16. 16.6 + 7 + 4 + 2 + 5 =
17. 17.97 × 5 =
18. 18.15% of 130 =
19. 19.₹85.90 − ₹46.65 =
20. 20.44 × 5 =
21. 21.Best estimate of 397 × 4? (a) 16000 (b) 3200 (c) 1600 (d) 160
22. 22.85 + 51 + 75 + 70 =
23. 23.Best estimate of 88 × 48? (a) 45000 (b) 4500 (c) 450 (d) 9000
24. 24.395 − 18 =
25. 25.89² =
26. 26.18 × 15 =
27. 27.₹98.05 + ₹2.75 =
28. 28.429 + 89 =
29. 29.Check with nines: 17 × 92 = 1564. Correct or wrong? (a) correct (b) wrong
30. 30.7 + 3 + 1 + 6 + 5 =
31. 31.6 + 3 + 6 + 7 + 2 =
32. 32.300 ÷ 50 =
33. 33.Check with nines: 35 × 95 = 3325. Correct or wrong? (a) wrong (b) correct
34. 34.1325 ÷ 25 =
35. 35.575 ÷ 25 =
36. 36.21 × 15 =
37. 37.479 − 29 =
38. 38.151 + 88 =
39. 39.160 − 46 =
40. 40.447 − 46 =

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