Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 880 · 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: 91 × 92 = 8372. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 820 + 745 = 1565. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 43 × 70 = 3008. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 552 + 244 = 796. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 823 + 367 = 1195. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 878 + 435 = 1310. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 46 × 73 = 3358. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 280 + 226 = 506. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 269 + 391 = 660. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 559 + 293 = 858. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 14 × 29 = 406. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 19 × 43 = 818. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 57 × 16 = 914. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 722 + 210 = 932. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 62 × 15 = 928. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 320 + 521 = 841. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 90 × 43 = 3870. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 489 + 462 = 951. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 446 + 300 = 746. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 609 + 631 = 1238. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 50 × 84 = 4200. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 817 + 538 = 1356. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 52 × 49 = 2541. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 191 + 219 = 410. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 28 × 27 = 756. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 59 × 32 = 1884. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 29 × 46 = 1335. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 39 × 85 = 3311. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 781 + 873 = 1650. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 81 × 25 = 2025. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 67 × 26 = 1742. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 297 + 768 = 1070. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 528 + 194 = 722. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 25 × 79 = 1967. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 58 × 38 = 2209. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 16 × 86 = 1383. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 48 × 78 = 3744. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 949 + 705 = 1657. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 35 × 41 = 1435. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 53 × 75 = 3981. Correct or wrong? (a) correct (b) wrong

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