Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 50 · 40 questions

The fast method (Casting out nines): Find the nine-check number of each number: add the digits until one digit is left. Do the same sum (× or +) with those digits and shrink the result to one digit too. Shrink the given answer. Different → wrong. Same → it passes the check.

1. 1.Check with nines: 81 × 74 = 5999. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 36 × 60 = 2160. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 83 × 40 = 3324. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 573 + 424 = 997. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 71 × 60 = 4260. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 42 × 89 = 3740. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 73 × 17 = 1247. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 28 × 15 = 420. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 38 × 53 = 2015. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 62 × 69 = 4271. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 48 × 73 = 3511. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 37 × 78 = 2886. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 82 × 53 = 4346. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 63 × 42 = 2639. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 48 × 82 = 3937. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 126 + 639 = 767. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 90 × 20 = 1799. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 79 × 38 = 3002. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 36 × 53 = 1908. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 12 × 15 = 180. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 34 × 91 = 3094. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 81 × 36 = 2916. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 227 + 811 = 1046. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 95 × 96 = 9120. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 647 + 907 = 1553. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 27 × 13 = 345. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 12 × 38 = 458. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 863 + 920 = 1783. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 82 × 21 = 1722. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 544 + 884 = 1428. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 624 + 845 = 1469. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 140 + 921 = 1057. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 415 + 167 = 574. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 14 × 53 = 746. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 65 × 98 = 6365. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 15 × 66 = 987. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 485 + 355 = 840. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 30 × 30 = 900. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 42 × 63 = 2639. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 166 + 474 = 640. Correct or wrong? (a) wrong (b) correct

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths