Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 457 · 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: 17 × 34 = 578. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 794 + 346 = 1140. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 794 + 601 = 1395. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 27 × 98 = 2647. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 85 × 77 = 6545. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 21 × 26 = 546. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 140 + 552 = 692. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 627 + 456 = 1083. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 833 + 953 = 1786. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 74 × 27 = 1998. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 454 + 819 = 1273. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 12 × 67 = 808. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 251 + 183 = 434. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 505 + 436 = 933. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 89 × 74 = 6587. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 67 × 93 = 6227. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 458 + 538 = 996. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 537 + 300 = 837. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 17 × 29 = 497. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 91 × 16 = 1456. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 84 × 21 = 1770. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 399 + 684 = 1084. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 31 × 38 = 1184. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 812 + 930 = 1742. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 38 × 43 = 1636. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 14 × 88 = 1232. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 35 × 95 = 3317. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 21 × 21 = 441. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 61 × 47 = 2864. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 44 × 36 = 1590. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 12 × 14 = 168. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 88 × 25 = 2200. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 25 × 50 = 1250. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 589 + 429 = 1025. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 889 + 924 = 1813. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 661 + 128 = 782. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 847 + 147 = 993. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 39 × 36 = 1404. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 979 + 824 = 1803. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 59 × 59 = 3474. Correct or wrong? (a) wrong (b) correct

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