Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 765 · 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: 64 × 39 = 2503. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 87 × 89 = 7743. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 676 + 194 = 877. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 15 × 32 = 480. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 491 + 502 = 998. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 126 + 671 = 797. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 38 × 56 = 2122. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 592 + 673 = 1265. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 48 × 20 = 960. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 84 × 77 = 6469. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 333 + 200 = 533. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 45 × 41 = 1845. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 28 × 59 = 1652. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 328 + 704 = 1038. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 69 × 69 = 4760. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 911 + 446 = 1361. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 240 + 170 = 417. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 44 × 38 = 1672. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 73 × 61 = 4453. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 989 + 332 = 1321. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 505 + 186 = 692. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 27 × 34 = 922. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 856 + 403 = 1263. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 73 × 82 = 5986. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 494 + 895 = 1389. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 28 × 47 = 1316. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 268 + 392 = 660. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 54 × 24 = 1296. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 410 + 520 = 930. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 20 × 94 = 1880. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 12 × 59 = 710. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 32 × 66 = 2112. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 16 × 82 = 1311. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 50 × 33 = 1650. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 96 × 86 = 8249. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 98 × 82 = 8034. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 346 + 410 = 762. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 75 × 43 = 3232. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 313 + 133 = 446. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 574 + 943 = 1512. Correct or wrong? (a) wrong (b) correct

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