Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 506 · 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: 165 + 751 = 916. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 497 + 229 = 726. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 18 × 46 = 828. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 43 × 51 = 2193. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 32 × 45 = 1440. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 94 × 83 = 7808. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 263 + 161 = 424. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 765 + 642 = 1406. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 142 + 762 = 900. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 61 × 47 = 2861. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 315 + 916 = 1231. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 975 + 915 = 1890. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 80 × 80 = 6399. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 19 × 79 = 1501. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 971 + 229 = 1200. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 577 + 307 = 884. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 18 × 30 = 540. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 36 × 14 = 509. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 48 × 89 = 4272. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 216 + 778 = 994. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 779 + 678 = 1464. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 26 × 85 = 2216. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 62 × 13 = 806. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 548 + 393 = 941. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 851 + 543 = 1395. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 975 + 259 = 1234. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 422 + 834 = 1256. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 268 + 284 = 552. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 216 + 615 = 831. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 330 + 718 = 1040. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 324 + 334 = 658. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 244 + 332 = 578. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 69 × 85 = 5865. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 34 × 16 = 539. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 23 × 16 = 368. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 267 + 159 = 429. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 636 + 993 = 1629. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 30 × 66 = 1980. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 75 × 49 = 3675. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 88 × 65 = 5721. Correct or wrong? (a) correct (b) wrong

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