Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 981 · 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: 85 × 25 = 2125. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 45 × 52 = 2340. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 34 × 75 = 2551. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 17 × 20 = 340. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 13 × 20 = 260. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 34 × 25 = 853. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 226 + 636 = 869. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 143 + 348 = 486. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 980 + 974 = 1954. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 675 + 201 = 876. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 88 × 86 = 7560. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 23 × 49 = 1127. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 61 × 94 = 5737. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 23 × 18 = 414. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 63 × 73 = 4599. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 25 × 21 = 525. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 82 × 76 = 6232. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 250 + 299 = 549. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 18 × 64 = 1158. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 136 + 630 = 766. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 92 × 79 = 7268. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 277 + 242 = 519. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 18 × 76 = 1376. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 14 × 50 = 700. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 23 × 84 = 1934. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 47 × 19 = 894. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 46 × 31 = 1426. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 86 × 28 = 2408. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 350 + 762 = 1114. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 876 + 383 = 1259. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 68 × 96 = 6528. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 463 + 772 = 1234. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 65 × 85 = 5529. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 467 + 635 = 1101. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 253 + 456 = 707. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 932 + 690 = 1614. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 203 + 738 = 949. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 721 + 963 = 1684. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 330 + 598 = 928. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 29 × 50 = 1456. Correct or wrong? (a) wrong (b) correct

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