Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 945 · 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: 360 + 350 = 711. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 16 × 42 = 672. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 476 + 996 = 1472. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 85 × 86 = 7310. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 509 + 333 = 842. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 241 + 201 = 448. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 520 + 264 = 784. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 75 × 99 = 7426. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 56 × 33 = 1848. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 788 + 598 = 1383. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 240 + 613 = 850. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 86 × 32 = 2760. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 231 + 651 = 884. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 60 × 64 = 3834. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 91 × 89 = 8098. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 84 × 76 = 6383. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 204 + 146 = 350. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 97 × 83 = 8051. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 22 × 80 = 1758. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 64 × 48 = 3072. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 28 × 82 = 2292. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 364 + 225 = 589. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 337 + 941 = 1278. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 31 × 28 = 868. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 342 + 361 = 709. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 85 × 67 = 5695. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 89 × 70 = 6236. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 97 × 37 = 3586. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 36 × 93 = 3356. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 156 + 634 = 795. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 649 + 441 = 1087. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 49 × 87 = 4256. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 36 × 50 = 1800. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 427 + 936 = 1365. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 373 + 951 = 1324. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 291 + 371 = 661. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 682 + 816 = 1498. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 846 + 356 = 1210. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 82 × 76 = 6232. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 61 × 90 = 5490. Correct or wrong? (a) wrong (b) correct

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