Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 720 · 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: 44 × 36 = 1581. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 31 × 55 = 1699. Correct or wrong? (a) wrong (b) correct
3. 3.Check with nines: 180 + 278 = 458. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 16 × 24 = 386. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 75 × 16 = 1200. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 517 + 332 = 843. Correct or wrong? (a) correct (b) wrong
7. 7.Check with nines: 70 × 50 = 3495. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 819 + 985 = 1804. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 473 + 763 = 1232. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 29 × 67 = 1943. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 164 + 580 = 744. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 58 × 14 = 812. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 795 + 884 = 1679. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 971 + 751 = 1718. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 33 × 53 = 1753. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 91 × 52 = 4737. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 676 + 955 = 1631. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 629 + 147 = 776. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 584 + 570 = 1154. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 33 × 39 = 1294. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 321 + 790 = 1104. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 330 + 784 = 1110. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 17 × 59 = 1003. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 16 × 44 = 704. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 41 × 81 = 3321. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 72 × 17 = 1224. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 43 × 88 = 3778. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 49 × 29 = 1421. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 44 × 14 = 616. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 447 + 244 = 689. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 61 × 47 = 2862. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 156 + 976 = 1132. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 591 + 947 = 1538. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 466 + 582 = 1048. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 36 × 68 = 2448. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 66 × 86 = 5678. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 67 × 23 = 1541. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 901 + 149 = 1044. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 43 × 86 = 3704. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 17 × 80 = 1353. Correct or wrong? (a) wrong (b) correct

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