Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 984 · 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: 257 + 312 = 569. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 78 × 72 = 5616. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 830 + 708 = 1533. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 57 × 81 = 4617. Correct or wrong? (a) wrong (b) correct
5. 5.Check with nines: 800 + 368 = 1168. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 511 + 679 = 1193. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 13 × 89 = 1152. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 18 × 95 = 1704. Correct or wrong? (a) wrong (b) correct
9. 9.Check with nines: 32 × 21 = 672. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 96 × 56 = 5376. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 872 + 755 = 1621. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 40 × 78 = 3121. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 50 × 82 = 4092. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 72 × 40 = 2880. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 229 + 901 = 1133. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 996 + 861 = 1857. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 835 + 680 = 1515. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 296 + 454 = 750. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 235 + 836 = 1071. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 52 × 91 = 4728. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 19 × 63 = 1197. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 56 × 28 = 1574. Correct or wrong? (a) correct (b) wrong
23. 23.Check with nines: 36 × 45 = 1620. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 19 × 80 = 1522. Correct or wrong? (a) correct (b) wrong
25. 25.Check with nines: 521 + 958 = 1479. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 922 + 738 = 1661. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 50 × 68 = 3400. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 957 + 265 = 1222. Correct or wrong? (a) wrong (b) correct
29. 29.Check with nines: 188 + 250 = 435. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 41 × 55 = 2253. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 28 × 24 = 672. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 40 × 81 = 3240. Correct or wrong? (a) correct (b) wrong
33. 33.Check with nines: 57 × 66 = 3760. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 797 + 428 = 1228. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 89 × 54 = 4806. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 609 + 983 = 1595. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 51 × 46 = 2346. Correct or wrong? (a) wrong (b) correct
38. 38.Check with nines: 813 + 831 = 1644. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 369 + 370 = 739. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 55 × 31 = 1713. Correct or wrong? (a) correct (b) wrong

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