Casting Out Nines Worksheet

Speed calculation lesson 13: Check it with nines · Set 535 · 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: 88 × 79 = 6952. Correct or wrong? (a) wrong (b) correct
2. 2.Check with nines: 15 × 91 = 1365. Correct or wrong? (a) correct (b) wrong
3. 3.Check with nines: 334 + 610 = 945. Correct or wrong? (a) correct (b) wrong
4. 4.Check with nines: 13 × 60 = 780. Correct or wrong? (a) correct (b) wrong
5. 5.Check with nines: 84 × 45 = 3776. Correct or wrong? (a) correct (b) wrong
6. 6.Check with nines: 25 × 29 = 721. Correct or wrong? (a) wrong (b) correct
7. 7.Check with nines: 562 + 191 = 751. Correct or wrong? (a) wrong (b) correct
8. 8.Check with nines: 80 × 73 = 5840. Correct or wrong? (a) correct (b) wrong
9. 9.Check with nines: 172 + 208 = 388. Correct or wrong? (a) wrong (b) correct
10. 10.Check with nines: 75 × 72 = 5400. Correct or wrong? (a) correct (b) wrong
11. 11.Check with nines: 799 + 835 = 1639. Correct or wrong? (a) wrong (b) correct
12. 12.Check with nines: 72 × 36 = 2592. Correct or wrong? (a) wrong (b) correct
13. 13.Check with nines: 87 × 50 = 4353. Correct or wrong? (a) correct (b) wrong
14. 14.Check with nines: 39 × 80 = 3120. Correct or wrong? (a) wrong (b) correct
15. 15.Check with nines: 796 + 592 = 1388. Correct or wrong? (a) correct (b) wrong
16. 16.Check with nines: 656 + 714 = 1364. Correct or wrong? (a) wrong (b) correct
17. 17.Check with nines: 525 + 527 = 1052. Correct or wrong? (a) correct (b) wrong
18. 18.Check with nines: 359 + 749 = 1108. Correct or wrong? (a) correct (b) wrong
19. 19.Check with nines: 467 + 464 = 931. Correct or wrong? (a) correct (b) wrong
20. 20.Check with nines: 34 × 24 = 816. Correct or wrong? (a) wrong (b) correct
21. 21.Check with nines: 284 + 195 = 479. Correct or wrong? (a) wrong (b) correct
22. 22.Check with nines: 702 + 279 = 981. Correct or wrong? (a) wrong (b) correct
23. 23.Check with nines: 40 × 82 = 3281. Correct or wrong? (a) wrong (b) correct
24. 24.Check with nines: 806 + 865 = 1673. Correct or wrong? (a) wrong (b) correct
25. 25.Check with nines: 22 × 66 = 1452. Correct or wrong? (a) wrong (b) correct
26. 26.Check with nines: 370 + 738 = 1107. Correct or wrong? (a) correct (b) wrong
27. 27.Check with nines: 29 × 15 = 435. Correct or wrong? (a) wrong (b) correct
28. 28.Check with nines: 686 + 991 = 1678. Correct or wrong? (a) correct (b) wrong
29. 29.Check with nines: 506 + 966 = 1472. Correct or wrong? (a) correct (b) wrong
30. 30.Check with nines: 852 + 531 = 1383. Correct or wrong? (a) correct (b) wrong
31. 31.Check with nines: 12 × 91 = 1095. Correct or wrong? (a) correct (b) wrong
32. 32.Check with nines: 67 × 61 = 4087. Correct or wrong? (a) wrong (b) correct
33. 33.Check with nines: 547 + 905 = 1452. Correct or wrong? (a) wrong (b) correct
34. 34.Check with nines: 354 + 149 = 504. Correct or wrong? (a) correct (b) wrong
35. 35.Check with nines: 50 × 81 = 4051. Correct or wrong? (a) correct (b) wrong
36. 36.Check with nines: 874 + 846 = 1720. Correct or wrong? (a) wrong (b) correct
37. 37.Check with nines: 20 × 43 = 860. Correct or wrong? (a) correct (b) wrong
38. 38.Check with nines: 99 × 65 = 6441. Correct or wrong? (a) wrong (b) correct
39. 39.Check with nines: 32 × 92 = 2948. Correct or wrong? (a) wrong (b) correct
40. 40.Check with nines: 713 + 946 = 1652. Correct or wrong? (a) correct (b) wrong

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