Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 770 · 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: 385 + 852 = 1237. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 56 × 52 = 2920. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 48 × 33 = 1587. Correct or wrong? (a) wrong (b) correct
4. 4.Check with nines: 78 × 37 = 2886. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 61 × 52 = 3174. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 571 + 847 = 1418. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 38 × 47 = 1783. Correct or wrong? (a) correct (b) wrong
8. 8.Check with nines: 47 × 24 = 1128. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 21 × 18 = 375. Correct or wrong? (a) correct (b) wrong
10. 10.Check with nines: 549 + 343 = 899. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 20 × 61 = 1223. Correct or wrong? (a) correct (b) wrong
12. 12.Check with nines: 51 × 39 = 1991. Correct or wrong? (a) correct (b) wrong
13. 13.Check with nines: 808 + 963 = 1772. Correct or wrong? (a) wrong (b) correct
14. 14.Check with nines: 95 × 35 = 3325. Correct or wrong? (a) correct (b) wrong
15. 15.Check with nines: 72 × 88 = 6344. Correct or wrong? (a) wrong (b) correct
16. 16.Check with nines: 536 + 977 = 1513. Correct or wrong? (a) correct (b) wrong
17. 17.Check with nines: 20 × 55 = 1100. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 75 × 92 = 6907. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 413 + 706 = 1116. Correct or wrong? (a) wrong (b) correct
20. 20.Check with nines: 845 + 417 = 1262. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 552 + 867 = 1419. Correct or wrong? (a) correct (b) wrong
22. 22.Check with nines: 55 × 76 = 4172. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 509 + 265 = 772. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 35 × 26 = 910. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 45 × 34 = 1528. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 668 + 423 = 1093. Correct or wrong? (a) wrong (b) correct
27. 27.Check with nines: 70 × 83 = 5810. Correct or wrong? (a) correct (b) wrong
28. 28.Check with nines: 199 + 333 = 526. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 245 + 232 = 479. Correct or wrong? (a) wrong (b) correct
30. 30.Check with nines: 709 + 312 = 1024. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 161 + 356 = 517. Correct or wrong? (a) wrong (b) correct
32. 32.Check with nines: 851 + 885 = 1736. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 911 + 232 = 1143. Correct or wrong? (a) correct (b) wrong
34. 34.Check with nines: 384 + 582 = 966. Correct or wrong? (a) wrong (b) correct
35. 35.Check with nines: 196 + 438 = 636. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 86 × 79 = 6794. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 370 + 698 = 1068. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 232 + 639 = 871. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 72 × 29 = 2088. Correct or wrong? (a) correct (b) wrong
40. 40.Check with nines: 257 + 885 = 1142. Correct or wrong? (a) correct (b) wrong

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