Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 883 · 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: 47 × 97 = 4564. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 693 + 489 = 1184. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 22 × 29 = 638. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 31 × 42 = 1304. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 873 + 770 = 1643. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 173 + 275 = 440. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 270 + 870 = 1140. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 88 × 21 = 1844. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 457 + 609 = 1068. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 452 + 234 = 684. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 72 × 98 = 7056. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 142 + 519 = 661. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 384 + 160 = 537. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 799 + 187 = 986. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 68 × 20 = 1360. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 843 + 842 = 1685. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 433 + 861 = 1294. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 79 × 49 = 3871. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 37 × 35 = 1303. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 75 × 15 = 1123. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 438 + 281 = 719. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 929 + 348 = 1277. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 669 + 638 = 1313. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 23 × 92 = 2116. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 762 + 649 = 1410. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 77 × 77 = 5929. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 94 × 33 = 3102. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 261 + 494 = 755. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 24 × 29 = 703. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 27 × 20 = 540. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 12 × 30 = 360. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 285 + 438 = 723. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 771 + 798 = 1573. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 26 × 86 = 2229. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 46 × 31 = 1422. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 47 × 82 = 3854. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 372 + 558 = 930. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 31 × 44 = 1364. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 39 × 93 = 3627. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 944 + 200 = 1139. Correct or wrong? (a) correct (b) wrong

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