1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 24 · 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.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.693 + 396 =
4. 4.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 528: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.594 + 495 =
8. 8.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.495 + 594 =
13. 13.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.792 + 297 =
24. 24.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 177: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
34. 34.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.396 + 693 =
40. 40.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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