1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 661 · 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 644: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.891 + 198 =
4. 4.297 + 792 =
5. 5.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.396 + 693 =
13. 13.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 317. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.495 + 594 =
20. 20.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.198 + 891 =
22. 22.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 325. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
35. 35.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 307. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?

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