Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 209 · 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: 76 × 19 = 1444. Correct or wrong? (a) correct (b) wrong
2. 2.Check with nines: 68 × 33 = 2237. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 81 × 87 = 7042. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 89 × 29 = 2586. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 20 × 24 = 481. Correct or wrong? (a) wrong (b) correct
6. 6.Check with nines: 72 × 71 = 5112. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 13 × 25 = 325. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 94 × 79 = 7426. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 50 × 40 = 2006. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 50 × 18 = 903. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 48 × 90 = 4320. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 66 × 31 = 2046. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 64 × 37 = 2368. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 621 + 690 = 1313. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 31 × 24 = 750. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 83 × 83 = 6889. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 543 + 900 = 1445. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 21 × 77 = 1617. Correct or wrong? (a) wrong (b) correct
19. 19.Check with nines: 25 × 19 = 468. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 170 + 647 = 809. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 73 × 47 = 3427. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 78 × 47 = 3666. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 79 × 15 = 1177. Correct or wrong? (a) correct (b) wrong
24. 24.Check with nines: 21 × 16 = 344. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 98 × 55 = 5386. Correct or wrong? (a) correct (b) wrong
26. 26.Check with nines: 25 × 78 = 1952. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 88 × 65 = 5720. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 63 × 13 = 815. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 658 + 953 = 1611. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 707 + 370 = 1077. Correct or wrong? (a) wrong (b) correct
31. 31.Check with nines: 87 × 78 = 6786. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 273 + 161 = 437. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 94 × 88 = 8272. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 411 + 395 = 811. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 963 + 372 = 1335. Correct or wrong? (a) wrong (b) correct
36. 36.Check with nines: 35 × 62 = 2170. Correct or wrong? (a) correct (b) wrong
37. 37.Check with nines: 818 + 491 = 1309. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 70 × 98 = 6862. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 205 + 285 = 482. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 400 + 719 = 1117. Correct or wrong? (a) correct (b) wrong

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