1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 372 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.297 + 792 =
2. 2.891 + 198 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.594 + 495 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Do the 1089 trick with 572: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.198 + 891 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 543. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 598: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.792 + 297 =
27. 27.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.396 + 693 =
29. 29.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 643. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 381: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 399: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
39. 39.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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