Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 710 · 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: 71 × 78 = 5540. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 47 × 74 = 3479. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 37 × 51 = 1889. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 583 + 701 = 1284. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 276 + 917 = 1193. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 96 × 90 = 8637. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 59 × 72 = 4248. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 27 × 75 = 2023. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 92 × 64 = 5888. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 88 × 41 = 3608. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 879 + 995 = 1874. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 969 + 979 = 1949. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 37 × 68 = 2518. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 879 + 581 = 1460. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 29 × 57 = 1653. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 961 + 906 = 1867. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 57 × 90 = 5130. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 636 + 870 = 1499. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 28 × 75 = 2100. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 464 + 825 = 1284. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 52 × 36 = 1869. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 721 + 877 = 1604. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 348 + 209 = 560. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 47 × 56 = 2632. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 987 + 893 = 1886. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 524 + 508 = 1032. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 36 × 18 = 648. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 37 × 62 = 2294. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 418 + 995 = 1413. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 58 × 45 = 2610. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 440 + 454 = 894. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 196 + 275 = 477. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 12 × 29 = 343. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 17 × 77 = 1309. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 937 + 349 = 1291. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 125 + 347 = 472. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 248 + 623 = 865. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 664 + 965 = 1635. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 35 × 32 = 1120. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 77 × 51 = 3927. Correct or wrong? (a) wrong (b) correct

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