Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 75 · 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. 1.70 × 4 =
2. 2.113 × 4 =
3. 3.945 ÷ 5 =
4. 4.499 − 18 =
5. 5.4 + 3 + 7 + 6 =
6. 6.13 × 4 =
7. 7.6 + 3 + 8 + 3 + 7 =
8. 8.47 × 4 =
9. 9.₹50.30 − ₹46.45 =
10. 10.319 + 69 =
11. 11.351 + 97 =
12. 12.Check with nines: 90 × 68 = 6127. Correct or wrong? (a) correct (b) wrong
13. 13.7 + 2 + 8 + 2 =
14. 14.₹87.05 + ₹6.85 =
15. 15.5 + 1 + 1 + 9 + 9 =
16. 16.Best estimate of 79 × 38? (a) 3200 (b) 320 (c) 6400 (d) 32000
17. 17.Check with nines: 646 + 314 = 960. Correct or wrong? (a) wrong (b) correct
18. 18.71 × 4 =
19. 19.Check with nines: 577 + 672 = 1257. Correct or wrong? (a) correct (b) wrong
20. 20.6 + 1 + 1 + 9 + 6 =
21. 21.Check with nines: 430 + 711 = 1141. Correct or wrong? (a) correct (b) wrong
22. 22.152 × 4 =
23. 23.159 − 19 =
24. 24.87 × 50 =
25. 25.82 × 50 =
26. 26.15% of 680 =
27. 27.375 ÷ 25 =
28. 28.600 ÷ 50 =
29. 29.1 + 8 + 8 + 2 =
30. 30.116 − 28 =
31. 31.Best estimate of 497 × 7? (a) 3500 (b) 350 (c) 35000 (d) 7000
32. 32.1200 ÷ 50 =
33. 33.466 + 38 =
34. 34.11 + 55 + 57 + 73 =
35. 35.Best estimate of 18 × 19? (a) 40 (b) 800 (c) 4000 (d) 400
36. 36.4 + 7 + 4 + 6 =
37. 37.36 + 77 + 24 + 15 =
38. 38.2 + 4 + 5 + 6 + 4 =
39. 39.Check with nines: 21 × 23 = 487. Correct or wrong? (a) correct (b) wrong
40. 40.400 ÷ 5 =

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