Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 833 · 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: 35 × 68 = 2381. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 86 × 97 = 8338. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 134 + 443 = 585. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 28 × 31 = 868. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 928 + 512 = 1440. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 45 × 75 = 3375. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 79 × 28 = 2212. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 66 × 67 = 4422. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 88 × 33 = 2900. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 52 × 40 = 2084. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 63 × 45 = 2835. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 628 + 550 = 1178. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 77 × 95 = 7315. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 25 × 91 = 2270. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 72 × 43 = 3098. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 724 + 402 = 1126. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 65 × 19 = 1235. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 450 + 346 = 796. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 31 × 17 = 527. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 31 × 54 = 1667. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 412 + 892 = 1297. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 47 × 80 = 3760. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 66 × 73 = 4818. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 48 × 56 = 2688. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 29 × 19 = 548. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 164 + 887 = 1051. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 848 + 134 = 981. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 23 × 22 = 503. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 42 × 31 = 1302. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 31 × 15 = 471. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 56 × 49 = 2751. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 29 × 12 = 345. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 973 + 622 = 1593. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 60 × 20 = 1201. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 95 × 71 = 6745. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 809 + 809 = 1621. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 468 + 897 = 1368. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 822 + 531 = 1356. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 451 + 697 = 1149. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 487 + 580 = 1073. Correct or wrong? (a) wrong (b) correct

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