Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 921 · 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: 414 + 121 = 529. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 331 + 967 = 1298. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 52 × 77 = 4004. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 135 + 704 = 841. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 27 × 38 = 1026. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 38 × 74 = 2812. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 79 × 56 = 4417. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 42 × 63 = 2642. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 173 + 234 = 404. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 951 + 141 = 1090. Correct or wrong? (a) wrong (b) correct
11. 11.Check with nines: 40 × 16 = 639. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 200 + 448 = 648. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 160 + 791 = 948. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 82 × 49 = 4021. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 922 + 457 = 1372. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 98 × 94 = 9212. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 82 × 35 = 2870. Correct or wrong? (a) wrong (b) correct
18. 18.Check with nines: 91 × 84 = 7644. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 960 + 578 = 1538. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 886 + 540 = 1426. Correct or wrong? (a) correct (b) wrong
21. 21.Check with nines: 23 × 23 = 529. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 81 × 21 = 1701. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 272 + 203 = 471. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 365 + 822 = 1195. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 35 × 84 = 2945. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 24 × 55 = 1320. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 99 × 15 = 1478. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 24 × 25 = 600. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 81 × 58 = 4698. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 15 × 45 = 680. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 970 + 766 = 1736. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 826 + 592 = 1418. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 19 × 96 = 1824. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 22 × 38 = 836. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 19 × 17 = 327. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 400 + 162 = 555. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 30 × 24 = 720. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 22 × 85 = 1870. Correct or wrong? (a) correct (b) wrong
39. 39.Check with nines: 42 × 35 = 1470. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 31 × 74 = 2294. Correct or wrong? (a) correct (b) wrong

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