Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 121 · 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: 321 + 223 = 544. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 729 + 218 = 947. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 823 + 836 = 1655. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 17 × 18 = 309. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 27 × 76 = 2057. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 422 + 354 = 776. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 76 × 74 = 5624. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 607 + 777 = 1384. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 703 + 731 = 1436. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 563 + 916 = 1477. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 73 × 70 = 5110. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 98 × 54 = 5292. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 87 × 47 = 4091. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 53 × 75 = 3975. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 574 + 204 = 778. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 376 + 810 = 1184. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 66 × 41 = 2699. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 397 + 506 = 903. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 638 + 271 = 916. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 972 + 274 = 1246. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 623 + 993 = 1623. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 64 × 79 = 5056. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 51 × 93 = 4743. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 38 × 53 = 2014. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 62 × 19 = 1178. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 37 × 64 = 2368. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 25 × 46 = 1150. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 47 × 63 = 2961. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 29 × 89 = 2580. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 231 + 997 = 1225. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 56 × 35 = 1959. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 81 × 49 = 3975. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 62 × 85 = 5270. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 45 × 95 = 4275. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 228 + 817 = 1045. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 13 × 91 = 1183. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 287 + 421 = 711. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 316 + 693 = 1009. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 482 + 345 = 820. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 21 × 96 = 2016. Correct or wrong? (a) correct (b) wrong

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